​In a certain code language, ‘DESK’ is coded as ‘9125’ and ‘SOKE’ is coded as ‘1352’.What is the code for ‘O’ in the given code language?

Given: ​

In a certain code language, ‘DESK’ is coded as ‘9125’ and ‘SOKE’ is coded as ‘1352’.

E, S, K and 1, 2, 5 are common in both.

So, the code of O is 3.

Thus, correct option is (a).