Question

Each of Mr. Raj, his mother, his wife, and his son is a different professional among lawyer, doctor, engineer, and accountant. - Accountant is not the son of the lawyer (lawyer is blood relative of the doctor). - Engineer is son of the accountant, who is not blood relative of the doctor. Who can \textbf{never be the doctor?}

• A. Mr. Raj
• B. Mr. Raj's wife
• C. Mr. Raj's son
• D. Both A and C

Hint:

In logic puzzles with professions, map relational constraints first, then test each possibility for contradictions.

Answer 1

The Correct Option is D

Step 1: Relation constraints

- The Engineer is the son of the Accountant.
- The Accountant is not a blood relative of the Doctor.
- Therefore, the Accountant must be either the wife or the son (since the mother and Raj are blood relatives).

Step 2: Lawyer–Doctor relationship

- The Lawyer is a blood relative of the Doctor.
- If the Doctor is Raj, then the Lawyer must be the mother or the son.
- But if Doctor = Raj, the Accountant would have to be the wife, and the Engineer = son of Accountant — this creates conflicts with the given constraints.

Step 3: Checking each person as Doctor

• If Doctor = Raj's son: Doctor is a blood relative, Accountant would be mother or wife. But Engineer = son of Accountant contradicts Doctor being the son (since the same person would be both Doctor and Engineer).
• If Doctor = Raj: Contradictions arise with the Lawyer and Accountant positions, breaking the constraints.

Conclusion:

From the analysis, both Mr. Raj and Mr. Raj's son can never be the Doctor.

Final Answer:

\[ \boxed{\text{Both A and C}} \]