Given:
- P, Q, and R are siblings (P is brother to Q and R).
- S is mother of R (and hence mother of P and Q).
- T is father of P (and thus likely father of siblings).
Evaluating the options:
- (a) True: T is Q’s father as he is father of the siblings.
- (b) True: S is P’s mother.
- (c) True: P is S’s son.
- (d) Cannot be definitely true: Q’s gender is not specified; Q could be a daughter, so calling Q “son” is an assumption.