Complete the sequence with the correct option from the following codes: EGIK : FILO : : FHJL : ?

The correct answer is D, GJMP.

The core concept is letter-position arithmetic. Take the letters of the first pair in order: E(5), G(7), I(9), K(11). Shift each one forward by its position number (1, 2, 3, 4): E+1=F, G+2=I, I+3=L, K+4=O. That gives FILO, so the second word is each letter moved forward by its position number.

Apply the same rule to FHJL: F(6)+1=G, H(8)+2=J, J(10)+3=M, L(12)+4=P. The result is GJMP.

• A (JGMP): J and G are out of order. Applying the rule would give G first, so J cannot be the first letter.
• B (JGPM): The first letter is wrong, and the last two letters are swapped. The third letter should be M, not P.
• C (GJPM): The first two letters are right, but the third and fourth are swapped. The third position needs J+3=M.

This kind of question tests systematic letter-number mapping, which is useful for reasoning and aptitude sections in both Prelims and Mains.

Trap: Candidates often find a step pattern in one word, such as +2 in EGIK, and assume the second word follows the same simple step. Always check the position-based shift, which is what links the two words.