If M x N means M is daughter of N; M + N means M is father of N; M % N means M is mother of N; M - N means M is brother of N. Then P % Q + R - T x K
indicates which relation of P to K?
I. Daughter-in-law
II. Sister-in-law
III. Aunt
IV. None of these

Question: 以下哪项是正确的？
Options:
A. 仅 II, B. 仅 I, C. 仅 III, D. 只有 IV
Answer: D
True statement: IV