In a certain code language, ‘BIRD’ is written as ‘DKTF’ and ‘KITE’ is written as ‘MKVG’. How will ‘EAGLE’ be written in that language?

Correct — A. Rule: every letter moves two places forward in the alphabet.

BIRD → DKTF: B→D, I→K, R→T, D→F
KITE → MKVG: K→M, I→K, T→V, E→G

Both samples agree, so apply +2 to EAGLE, letter by letter and in place:

E→G, A→C, G→I, L→N, E→G

The code is GCING — option (a).

Why the others are wrong

• (b)
  GGNCI — GGNCI is the right five letters in the wrong order. A code that shifts each letter where it stands cannot also shuffle the word.
• (c)
  INGGC — INGGC is another re-ordering of the same five letters. The first letter must come from E, and E + 2 is G, not I.
• (d)
  IGNCG — IGNCG opens with I, which is E moved four places, not two. Both sample words move exactly two.

Confirm the shift on both sample words before you code the target. One sample can fit several rules — a fixed shift, a growing shift, a reversal — and the second sample is what rules them out.

Then code left to right and keep the letters where they are. Here the danger is not the arithmetic but the transcription: all four options are the same five letters, G, C, I, N, G, in four different orders.

Write the target word out with its code letter under each letter, then read the code off in that order.

Key facts

• BIRD → DKTF and KITE → MKVG both work by adding 2 to each letter's position.
• EAGLE has five letters, so the code has five: G, C, I, N, G.
• All four options are permutations of those same five letters, so only the order decides.

Common traps

• Getting the shift right and then writing the letters out of order
• Shifting the first letter only and matching the rest by eye
• Checking the rule against one sample word instead of both

No directly related past PYQ was found.