MXN : 13 x 14 :: FXR : ?

Question: MXN : 13 x 14 :: FXR : ?
[A].

14 x 15

[B].

5 x 17

[C].

6 x 18

[D].

7 x 19

Answer: Option C

Explanation:

As position of M and N in Eq. alphabets are 13 and 14 respectively.