Correct option is B
Given: If KIN is written as PRM.

Logic: Opposite letters.
For, KIN - PRM
K - P (Oppoite)
I - R (Oppoite)
N - M (Oppoite)
Similarly,
THREAD - ?
T - G (Oppoite)
H - S (Oppoite)
R - I (Oppoite)
E - V (Oppoite)
A - Z (Oppoite)
D - W (Oppoite)
So, THREAD is written as GSIVZW.
Thus, correct option is (b).