Each question contains a statement on relationship and question regarding relationship based on the statement. Choose the correct option.

Pointing to a photograph, a man said, “I have no brother or sister but that man’s father is my father’s son. Whose photograph was that?

Correct Option: His son’s

To determine whose photograph the man is pointing to, let us break down the statement step-by-step using logical deduction.

Step 1: Analyze the clause "my father’s son".
The speaker says, "I have no brother or sister."
Since he is an only child, his father's son must be himself.
$\text{“My father’s son”}=\text{The speaker (himself)}$

Step 2: Substitute this back into the full statement.
The original statement is: "that man’s father is my father’s son."
Replacing "my father's son" with "me" (the speaker), the sentence becomes:
"That man’s father is me."

Step 3: Determine the relationship.
If the speaker is the father of the man in the photograph, then the photograph must be of his son.

Therefore, the photograph was of his son’s.