In a certain code language 'DOCTOR' is written as 'ILGXLW', then how is…

Concept: In this coding pattern, the word is first reversed, and then every letter is replaced with its 'opposite' letter in the alphabet — the letter that is the same number of places from the end as the original is from the start (A↔Z, B↔Y, C↔X, D↔W, and so on; a letter at position n pairs with the letter at position 27−n).

Application:

1. Verify the rule with the given example: reverse DOCTOR to get ROTCOD.

2. Replace each letter of ROTCOD with its opposite: R→I, O→L, T→G, C→X, O→L, D→W, giving ILGXLW — this matches the code given in the question, confirming the rule.

3. Apply the same rule to STUDENT: reverse it to get TNEDUTS.

4. Replace each letter of TNEDUTS with its opposite: T→G, N→M, E→V, D→W, U→F, T→G, S→H.

5. Combining these gives the code GMVWFGH.

Cross-check: Reversing GMVWFGH's letter-opposite mapping (G→T, M→N, V→E, W→D, F→U, G→T, H→S) gives TNEDUTS, and reversing that word back gives STUDENT — confirming the code is consistent both ways.