Question

if the code of madras is nbesbt then what will be the code of Bombay

Answer 1

I could not understand make it clear

Answer 2

Clearly every letter is increased by 1 as
M +1 N
A +1 B
D +1 E
R +1 S
A +1 B
S +1 T

So after increasing every character in work BOMBAY by 1, we get cpncbz