Select the related word/letters/number from the given alternatives.

ACEG : ZXVT :: IKMO : ?

Expression = ACEG : ZXVT

The pattern followed is that there are as many alphabets to the left of the first letter as there are to the right of the leftmost letter in right hand side

A is the first letter and Z is the last, C is 3rd from left end and X is 3rd from right end. E is 5th from left end and V is 5th from right end. Finally, G is 7th from left end and T is 7th from right end in English alphabetical series.

Similarly, for IKMO :

Now, I is 9th from left end, thus first letter will be 9th from right end = R

K is 11th from left end, second letter will be 11th from right end = P

M is 13th from left end, third letter will be 13th from right end = N

O is 15th from left end, third letter will be 15th from right end = L

Thus, missing term = RPNL

=> Ans - (A)