Explanation
Solution
Given:
A family of six members (A, B, C, D, E, and F) with professions: Psychologist, Manager, Advocate, Jeweller, Doctor, and Engineer.
Analysis:
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Step 1: Identify the "Grandfather" figure.
The problem states: "Doctor is the grandfather of F."
Later, it confirms: "Manager D is married to A means A is the doctor and Grandfather of F and E."
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Step 2: Assign the profession to A.
Based on the explicit statement in the reasoning provided:
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Step 3: Check the options.
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Option 1 is Manager (Incorrect, that is D).
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Option 2 is Engineer (Incorrect, that is E).
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Option 3 is Can't be determined (Incorrect, it is clearly stated).
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Option 4 is None of these (Correct, because the actual profession is Doctor, which is not listed in options 1 or 2).
Conclusion:
Hence, A is the Doctor.