Choose the group of letters that is different from the others -

Explanation

On solving the question according to the options - (a) O R U X + 3 + 3 + 3 (b) P S V X + 3 + 3 + 4 (c) C F I L + 3 + 3 + 3 (d) J M P S + 3 + 3 + 3 Therefore, option (b) is the correct answer.