The following question is based on the following alphabet series.
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 Which letter is the seventh to the right of the thirteenth letter from your left ?

Answer: B. T

Counting from the left i.e. A in the given alphabet, the thirteenth letter is M. Counting from M towards the right, the seventh letter is T.