Pointing to a man, a woman says, "His mother is the only daughter of my mother." In this verbal reasoning blood relation puzzle, how is the woman related to the man?

Introduction / Context:
This is a classic and simple blood relation question. A woman points to a man and describes his mother by using the phrase only daughter of my mother. We must interpret this description carefully to find out who the woman herself is in relation to the man. Such questions are common in competitive exams and test clear thinking with everyday family words.

Given Data / Assumptions:
• The speaker is a woman.• She says that the mother of the man is the only daughter of her own mother.• Only daughter of a woman means that there is exactly one female child.• No other daughters are implied.

Concept / Approach:
The phrase my mother refers to the speaker's mother. The only daughter of my mother is the speaker herself, because she is a woman and there is only one daughter in that family. When she says his mother is the only daughter of my mother, she is effectively saying his mother is me. That means the speaker is the mother of the man in the photograph. Recognising this step is the key to answering the question.

Step-by-Step Solution:
Step 1: Let M be the mother of the woman who is speaking.Step 2: The speaker says that the mother of the man is the only daughter of M.Step 3: The speaker herself is a daughter of M.Step 4: Since M has only one daughter, the speaker must be that only daughter.Step 5: Therefore, the mother of the man is the speaker herself.Step 6: If the speaker is the mother of the man, then in family relation terms, the woman is the mother and the man is her son.

Verification / Alternative check:
We can test if any other person could be the only daughter of the speaker's mother. If there were another daughter, then the phrase only daughter would be false. The statement does not mention any other sister. Thus the only daughter is uniquely identified as the speaker. Once that is established, there is no alternative but to interpret his mother as the speaker. So, the link is clear and unambiguous.

Why Other Options Are Wrong:
Daughter of the man: This would require the woman to be of a younger generation, which is opposite to her being the mother.Sister of the man: For this to be true, his mother and the speaker would share parents as siblings, not be the same person.Grandmother of the man: A grandmother would be mother of his parent, adding one more generation.Aunt of the man: An aunt would be a sister of his parent, which again is not the case here.

Common Pitfalls:
Many candidates misread only daughter and assume the woman might be talking about a sister. Others forget that the speaker is a woman and directly fits the role of a daughter of her mother. Paying attention to the word only and mapping it to the speaker herself avoids confusion and leads directly to the correct conclusion that she is the man's mother.

Final Answer:
The woman is the mother of the man in the photograph.