If A $ B means A is brother of B; A @ B means A is wife of B; A # B means A is daughter of B; A * B means A is father of B.
Which indicates U is father-in-law of P?
I. P @ Q $ T # U * W
II. P @ W $ Q * T # U
III. P @ Q $ W * T # U
IV. P @ Q $ T # W * U

Question: 以下哪项是正确的？
Options:
A. 以上各项均不成立, B. 仅 III, C. I 为真, D. 仅 II
Answer: C
True statement: I