Correct option is B
AEI and CGK:
First letters: A (1) → C (3): Increment of 2
Second letters: E (5) → G (7): Increment of 2
Third letters: I (9) → K (11): Increment of 2
Applying the same pattern to NRV:
First letter: N (14) → N + 2 = P (16)
Second letter: R (18) → R + 2 = T (20)
Third letter: V (22) → V + 2 = X (24)
Thus, the related letters for NRV are PTX.
The correct answer is (b) PTX.