If P $ Q means P is father of Q; P # Q means P is mother of Q; P * Q means P is sister of Q. N # L $ P * Q
shows which relation of Q to N?
I. Grandson
II. Granddaughter
III. Nephew
IV. Data is inadequate
Question: 以下哪项是正确的？
Options:
A. 仅 III, B. 非 I, C. 以上各项均不成立, D. 非 III, E. IV 为真
Answer: B, D, E