In a certain code language, ‘EARLY’ is written as ‘ZNSCF’ and ‘GAUGE’ is written as ‘FIVCH’. How will ‘INBOX’ be written in that language

In a certain code language, ‘EARLY’ is written as ‘ZNSCF’ and ‘GAUGE’ is written as ‘FIVCH’. How will ‘INBOX’ be written in that language?
A. YQCQJ
B. JPCQY
C. YQCPJ
D. XPBOI
Sol:
Pattern follows here is +1, +2, +1, +2, +1 and the output written in reverse order.