If in a certain language, 'MIRACLE' is coded as 'NCQBNMD', how is 'GROWTH' coded in that language? MCQ with Answer and Explanation

Each letter +1: M→N, I→J but given N C Q... Not matching. Perhaps reverse and +1. MIRACLE reversed ELCARIM +1 → FMD BSJN not. Perhaps different. Standard +1 for each: but given NCQBNMD is M+1=N, I+1=J not C. Perhaps skip.