In a certain code language, COMPUTER is written as 31191267218 and PHONE is written as 12511142. How will MOTHER be written in the same code language?

COMPUTER → 31191267218, PHONE → 12511142

MOTHER → ?

Logic: ​The code follows a fixed substitution pattern (Common Code) 

C → 3

P → 12

U → 6

P → 12

N → 14

Here's the final breakdown based on the consistent code pattern:​

​9 (M), 11 (O), 7 (T), 5 (H), 2 (E), 18 (R)

So,  MOTHER → 91175218

Thus, the correct option is: (b)