If the word CAPITAL is written as AYNGRYJ in a code , how could you code FORGET?

The coding rule shifts each letter backward by one position in the alphabet: C→B, A→Z, P→O, I→H, T→S, A→Z, L→K. Applying the same rule to FORGET: F→E, O→N, R→Q, G→F, E→D, T→S, giving ENQFDS. However, looking at the actual transformation, CAPITAL→AYNGRYJ shows a +1 shift (C→D, A→B, P→Q), not -1. Rechecking with +1: F→G, O→P, R→S, G→H, E→F, T→U gives GPSHFU, which doesn't match any option. The pattern must be different.