In a certain code language 'SNOW' is written as 'HMLD'. How will 'MIST' be written as in that language?

Given:  'SNOW' is written as 'HMLD'.

Logic:  Each letter is replaced by its opposite letter in the alphabet.

'SNOW' → 'HMLD'

S (19) → H (8) 
N (14) → M (13)
O (15) → L (12) 
W (23) → D (4)
Applying the Same Pattern to 'MIST'
M (13) → N (14)
I (9) → R (18)
S (19) → H (8)
T (20) → G (7) 

So, NRHG will be the code of 'MIST'​
Thus, the Correct  option is (c) NRHG