Which option will replace the '?'

ELFA, GLHA, ILJA, ? , MLNA

KLLA

Each pair of letters seems to follow a specific pattern.

From E to G: the first letter increments by 2 (E -> F -> G).

From L to L: the second letter stays the same.

From F to H: the third letter increments by 2 (F -> G -> H).

From A to A: the fourth letter stays the same.

Applying the same pattern:

I increments by 2 to K.

L stays the same.

J increments by 2 to L.

A stays the same.

So, the fourth term in the sequence should be KLLA.