Explanation:

Let's draw the relations step by step:

S is mother of T

• S → mother of T

T is husband of J

• T ↔ J (husband-wife)

N is son of J

• J → mother of N
• T → father of N

Z is father-in-law of J

• Since T is J's husband, Z is T's father.

K is brother of N

• K and N are children of T and J.

Therefore, K is also the child of T.

Since Z is T's father, K is Z's grandson (or granddaughter if K is female, but brother means male).

So K is Z's grandson, which is not among the given options.

✅ Correct Answer: (D) None.