In a certain code language 'GOAL' is written as 'HPBM'. How will 'POST' be…

Concept: In this type of letter-coding question, each letter of the given word is replaced by another letter obtained by shifting it a fixed number of positions forward (or backward) in the English alphabet. The same fixed shift that converts the code word applies to every letter of any other word coded in the same scheme.

Application: First, find the shift used in the example GOAL to HPBM.

1. G + 1 = H

2. O + 1 = P

3. A + 1 = B

4. L + 1 = M

Every letter moves forward by exactly one position, so the code rule is: shift each letter of the word one step forward in the alphabet.

Now apply the same +1 shift to each letter of POST:

1. P + 1 = Q

2. O + 1 = P

3. S + 1 = T

4. T + 1 = U

So POST is coded as QPTU.

Cross-check: Reversing the shift on QPTU (each letter one step back) gives Q-1=P, P-1=O, T-1=S, U-1=T, which restores POST exactly, confirming the coding is consistent in both directions.