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.
