In a certain code language, ‘LOSE’ is written as ‘MQVI’. How will ‘GAIN’ be…

Concept: In this letter-shift coding, every letter of the word is moved forward in the alphabet, but each letter position uses a different shift amount — the 1st letter shifts by +1, the 2nd by +2, the 3rd by +3, and the 4th by +4.

Confirming the pattern from the given example, LOSE → MQVI:

1. L (12th letter) + 1 = M (13th letter)

2. O (15th letter) + 2 = Q (17th letter)

3. S (19th letter) + 3 = V (22nd letter)

4. E (5th letter) + 4 = I (9th letter)

Applying the same +1, +2, +3, +4 shift to GAIN:

1. G (7th letter) + 1 = H (8th letter)

2. A (1st letter) + 2 = C (3rd letter)

3. I (9th letter) + 3 = L (12th letter)

4. N (14th letter) + 4 = R (18th letter)

Cross-check: reversing the same shifts on H, C, L, R (i.e., −1, −2, −3, −4) returns G, A, I, N, confirming the coding is consistent both ways.

So GAIN is coded as HCLR.