Step 1: Analyze the family structure.
From the previous family details, we can derive the following:
- The accountant is part of the second generation, and his wife would also be in the second generation, not the fourth.
- The husband of X being an engineer is valid.
- The second generation members mentioned are S, P, T, and O.
- The number of female members in the family is 5.
Step 2: Evaluate the options.
(a) "Husband of X is an engineer" is correct.
(b) "Second generation members are S, P, T, and O" is correct.
(c) "The number of female members in the family is 5" is correct.
(d) "The accountant and his wife belong to the 4\textsuperscript{th} generation" is incorrect because the accountant belongs to the second generation, not the fourth.
Step 3: Final Answer
The correct answer is (d) The accountant and his wife belong to the 3\textsuperscript{rd} generation.
Final Answer: The correct answer is (d) The accountant and his wife belong to the 3\textsuperscript{rd} generation.