What should come in place of the question mark (?) in the given series based on the English alphabetical order?
FKP DIN BGL ZEJ ?

FKP DIN BGL ZEJ ?

Logic: all letter -2. 

F − 2 = D, D − 2 = B, B − 2 = Z, Z − 2 = X → First letter: X
K − 2 = I, I − 2 = G, G − 2 = E, E − 2 = C → Second letter: C
P − 2 = N, N − 2 = L, L − 2 = J, J − 2 = H → Third letter: H​​

Correct answer is (a) XCH.