Correct option is D

Identification:
Identify the logic in each letter in the word:
ZC – AI
Place of Z is the according to table (Z comes at 26th position) = 26
Similarly,
For C = 3
For A= 1
For I = 9
Z (26 ) + 1 = A (1)
C(3) + 2 = E(5)
Logic: First letter (+1, +2, +3…) and second letter (+2)
Trick to solve:
Z → (+1) = A → (+2) = C → (+3) = F → (+4) = J
C → (+2) = E → (+2) = G → (+2) = I → (+2) = K
Therefore, the correct answer is (d).