Pointing to a man, a woman said, 'His mother is the only daughter of my mother.'
How is the woman related to the man?
I. Mother
II. Grandmother
III. Sister
IV. Daughter
Question: 以下哪项是正确的？
Options:
A. 仅 II
B. IV 或 II
C. 只有 I
D. II 或 III
E. 仅 III
Answer: C
True statement: I