Concept:The 1st and 3rd letters follow a fixed pattern of +2, while the 2nd and 4th letters remain the same.
Explanation:Look at the given series: ELFA, GLHA, ILJA, ____, MLNA.
The 1st letters are E, G, I, ?, M. These increase by +2: E → G → I → K → M.
The 3rd letters are F, H, J, ?, N. These also increase by +2: F → H → J → L → N.
The 2nd letter is L in every term.
The 4th letter is A in every term.
So the missing term must have K as the 1st letter, L as the 2nd, L as the 3rd, and A as the 4th.
Therefore, the missing term is KLLA.
Answer:KLLA (Option D).