KL91 is related to CD66 in a certain way. In the same way, MN81 is related to EF56. To which of the following is OP71 related, following the same logic?

KL91 → CD66

MN81 → EF56

OP71 → ?

Logic: each term in first and second  letter is decrease by 8 and third number is decrease by 25.

KL91 → CD66

K → C (-8), L → D (-8) → 91 → 66 (-25)

M → E (-8), N → F (-8) → 81 → 56 (-25)

Similarly,

​O → G (-8) → P → H (-8) → 71 → 46 (- 25)

The missing number is 46.

Thus the correct answer is: Option D