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UPSC PYQPrelims 2025

Civil Services Examination · Question 55

P is the brother of Q and R. S is R's mother. T is P's father. How many of the following statements are definitely true? I. S and T are a couple. II. Q is T's son. III. T is Q's father. IV. S is P's mother. V. R is T's daughter. VI. P is S's son. Select the correct answer using the code given below:

  1. Only two
  2. Only three
  3. Only four
  4. Only five
Show answer & explanation

Answer: (C) Only four

Explanation

P, Q, R are siblings with mother S and father T, so I, III, IV and VI are definite. The genders of Q and R are unknown, so II and V are not. (Answer as per the official UPSC answer key.)