Pointing to a photograph Lata says, 'He is the son of the only son of my grandfather.'
How is the man in the photograph related to Lata?
I. Brother
II. Uncle
III. Cousin
IV. Data is inadequate

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