This question is based on the general English alphabet: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z. If the letters of the given alphabet interchange positions, so that A takes the place of Z and Z takes the place of A, B exchange its place with Y and so on, what will be the thirteenth letter from the right?

M

If we interchange the positions:

Z Y X W V U T S R Q P O N M L K J I H G F E D C B A

Then, 13th letter from right will be "M".