A. Husband of X is an engineer: This is true because K is the husband of X, and it's mentioned that K is associated with the profession of engineering.
B. Second generation members are S, P, T, and O: This is not true. P, T, and O are siblings, but S is not part of the same generation. Therefore, this statement is false.
C. The number of female members in the family is 5: This could be true based on the given details, where we have female members like N, L, X, and possibly more based on the family structure.
D. The accountant and his wife belong to the 4th generation: This is not true because the accountant (likely Q) and his wife do not belong to the 4th generation. They would belong to an earlier generation. Upon reviewing the options again, the statement that is definitely not true is D.The correct option is (D): The accountant and his wife belong to the 4th generation