P, Q, R, S, T and U are six members of a family. R is the spouse of Q. U is the mother of T and S is the daughter of U. P’s daughter is T and R’s son is P. There are two couples in the family. Which one of the following is correct?

Correct Option (4)

Based on the provided information, the family relationships can be established as follows:

• R and Q form a couple.
• P is the son of R. Since R and Q are a couple, P is also the son of Q. Therefore, P is male (+).
• P and U form a couple, as P is the father of T, and U is the mother of T. Thus, U is female (-).
• T is the daughter of P and U. Therefore, T is female (-).
• S is the daughter of U. Since P and U are a couple, S is also the daughter of P. Therefore, S is female (-).

From these relationships, T is the daughter of P, and P is the son of Q. This makes T the grandchild of Q. Since T is female, T is the granddaughter of Q. This statement is definitively true based on the given facts, without requiring any assumptions about Q's gender.

Incorrect Options:

The family tree establishes that T is the grandchild of Q. However, the specific gender of Q (whether male or female) is not provided in the question. Therefore:

• Option 1: Q is the grandfather of T. This statement implies Q is male. Since Q's gender is not specified, this cannot be confirmed as definitively correct.
• Option 2: Q is the grandmother of T. This statement implies Q is female. Since Q's gender is not specified, this cannot be confirmed as definitively correct.
• Option 3: R is the mother of P. The problem states "R's son is P," indicating R is a parent of P. However, R's gender is not specified. R could be either the father or the mother of P. Therefore, this statement cannot be confirmed as definitively correct.