Pointing to a photograph, a man says, "I have no brother or sister, but that man’s father is my father’s son." Whose photograph is it?

1. A

   His own

2. B

   His son’s

3. C

   His father’s

4. D

   His nephew’s

Appeared in: RML MAINS 2025

Explanation

• The statement "I have no brother or sister" is the starting point, confirming the speaker is an only child.
• Because the speaker is a man and an only child, the phrase "my father's son" can only refer to the speaker himself.
• By substituting this back into the sentence, the logic becomes: "That man's father is me (the speaker).".
• If the speaker is the father of the man in the photograph, it follows that the person in the photograph is his son.

Why Other Options Were Wrong

• Option A: The statement describes a relationship between two different people (a father and a son), not an identification of oneself.
• Option C: The logic establishes the speaker as the father, not the son, of the person in the photograph.
• Option D: This is directly contradicted by the first part of the statement, "I have no brother or sister." A nephew requires a sibling.

Related Visual

Clinical Relevance

• Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Logical Reasoning - Blood Relations as background academic context rather than a clinical decision trigger.
• While not a clinical question, this type of logical deduction is a core component of critical thinking, a vital skill for nurses.
• Nurses must analyze complex patient statements, medical histories, and symptom patterns to arrive at correct conclusions for care planning.
• This problem-solving process mirrors the diagnostic reasoning used in clinical practice to connect different pieces of information.

How to Approach the Question

• First, identify the speaker and the subject (the man in the photograph) as distinct entities.
• Break the statement into two parts: the condition ("I have no brother or sister") and the relationship ("that man's father is my father's son").
• Solve the most self-contained part first: determine who "my father's son" is. Given the condition, it must be the speaker himself.
• Substitute this simplified piece back into the main statement: "that man's father is [the speaker]."
• Evaluate the resulting simplified statement to find the final relationship.
• Eliminate options that are directly contradicted by the facts given in the statement (e.g., having a nephew is impossible).

Concept Tested & Keywords

• Concept Tested: Logical Reasoning - Blood Relations
• Stem keywords: photograph, man says, no brother or sister, man's father, my father's son
• Lead-in keywords: Whose photograph is it?

Question ID

QKWVz5TEA-8x2qhWLD_Bub

Copy ID