NDA NA 2026 — General Intelligence & Reasoning: Blood Relations (20 Practice MCQs)
Practise these 20 MCQs on Blood Relations for NDA NA 2026. Each question includes a detailed explanation.
Difficulty: Medium | Subject: General Intelligence & Reasoning | Topic: Blood Relations
Q1. A is the mother of B. C is the brother of A. What is C to B?
- A. Uncle
- B. Nephew
- C. Cousin
- D. Father
Answer: A — C is A's brother. A is B's mother. So C is B's maternal uncle.
Q2. Pointing to a woman, Ravi says 'She is the only daughter of my grandfather's son.' How is she related?
- A. Sister
- B. Mother
- C. Aunt
- D. Niece
Answer: A — Grandfather's son = father. Father's only daughter = sister.
Q3. A woman introduces a man as son of her mother's brother. How is the man related?
- A. Cousin
- B. Nephew
- C. Uncle
- D. Son
Answer: A — Mother's brother = uncle. Uncle's son = cousin.
Q4. Rohit's mother is the only daughter of Seema's father. How is Seema related to Rohit?
- A. Mother
- B. Sister
- C. Aunt
- D. Grandmother
Answer: A — Only daughter of Seema's father = Seema. So Seema is Rohit's mother.
Q5. Pointing at a man, a lady says 'His mother is the only daughter of my mother.' Relation of lady to man?
- A. Mother
- B. Sister
- C. Grandmother
- D. Aunt
Answer: A — Only daughter of lady's mother = lady herself. So the man's mother = the lady.
Q6. P is brother of Q. R is mother of Q. S is father of R. How is P related to S?
- A. Grandson
- B. Nephew
- C. Son
- D. Grandfather
Answer: A — R is P and Q's mother. S is R's father. So S is P's grandfather and P is S's grandson.
Q7. A + B = A is father of B. A - B = A is mother of B. P + Q - R means P is R's ___?
- A. Grandfather
- B. Grandmother
- C. Father
- D. Uncle
Answer: A — P is Q's father. Q is R's mother. So P is R's maternal grandfather.
Q8. X says to Y: 'Your mother's husband's sister is my aunt.' How is Y related to X?
- A. Sibling
- B. Nephew/Niece
- C. Cousin
- D. Parent
Answer: A — Y's mother's husband = Y's father. Father's sister = aunt. Same aunt as X's → Y and X are siblings.
Q9. Introducing Rita, Sonu says 'She is the wife of my wife's only brother.' Rita is Sonu's ___?
- A. Sister-in-law
- B. Wife
- C. Niece
- D. Cousin
Answer: A — Wife's brother = brother-in-law. His wife = Sonu's sister-in-law.
Q10. A is B's sister. C is B's mother. D is C's father. How is A related to D?
- A. Granddaughter
- B. Daughter
- C. Grandmother
- D. Great Granddaughter
Answer: A — A is C's daughter. D is C's father. So A is D's granddaughter.
Q11. Rahul says 'He is the son of my father's only son.' Who is that person?
- A. Son
- B. Brother
- C. Nephew
- D. Cousin
Answer: A — Father's only son = Rahul (assuming no brothers). Rahul's son = that person.
Q12. Nitu is the daughter-in-law of Mahesh. Sona is Mahesh's daughter. Nitu to Sona?
- A. Sister-in-law
- B. Cousin
- C. Aunt-Niece
- D. Mother-Daughter
Answer: A — Nitu is married to Mahesh's son. Sona is Mahesh's daughter. So they are sisters-in-law.
Q13. Suresh's sister is wife of Ramesh's brother. Suresh is Ramesh's ___?
- A. Brother-in-law
- B. Brother
- C. Uncle
- D. Nephew
Answer: A — Ramesh's brother married Suresh's sister. So Suresh is Ramesh's brother-in-law.
Q14. If X is son of Q, Q is daughter of Y, Y is mother of P, then X is P's ___?
- A. Nephew
- B. Uncle
- C. Cousin
- D. Son
Answer: A — Q is Y's daughter and P's sister. X is Q's son = P's nephew.
Q15. A says to B: 'Your father's brother's daughter is my cousin.' A and B are ___?
- A. Cousins
- B. Siblings
- C. Aunt-Nephew
- D. Uncle-Niece
Answer: A — B's father's brother's daughter = B's cousin. If that's also A's cousin, A and B are cousins.
Q16. Pointing to a girl, a man says 'She is the daughter of the only son of my grandfather.' How is she related?
- A. Daughter
- B. Sister
- C. Niece
- D. Cousin
Answer: B — Grandfather's only son = father. Father's daughter = sister.
Q17. B is the brother of A. C is the daughter of B. D is the sister of B. E is the mother of D. E is __ of C?
- A. Grandmother
- B. Mother
- C. Aunt
- D. Sister
Answer: A — E is D's mother. D and B are siblings. E is also B's mother. B is C's father. So E is C's paternal grandmother.
Q18. Looking at a portrait: 'His mother is the wife of my father's son. I have no siblings.' Whose portrait?
- A. Son
- B. Self
- C. Nephew
- D. Cousin
Answer: A — Father's son (no siblings) = me. My wife = his mother → he is my son.
Q19. Kavya says 'This boy is the son of my mother's husband.' Who is the boy to Kavya?
- A. Brother
- B. Son
- C. Nephew
- D. Cousin
Answer: A — Mother's husband = father. Father's son = brother.
Q20. Ram's mother is Shyam's daughter. How is Shyam related to Ram?
- A. Grandfather
- B. Father
- C. Uncle
- D. Brother
Answer: A — Ram's mother is Shyam's daughter. So Shyam is Ram's maternal grandfather.
Quick Tips for Blood Relations
- Practise at least 20 questions daily.
- Aim for under 60 seconds per question.
- Revisit wrong answers to fix concepts.
