In the following series, count each N which is immediately followed by X but X is not immediately followed by T. How many such N's are there ?
N  X  N  T  Q  M  N  X  T  M  X  N  X  C  N  Q  M  N  N  X  Q  N  X  T  X  N  A  M  X  N  X  M

B. 4

H  D  Y  S  M  W  N  B  Q  P  O  C  R  T  B  L  Z  V  E  G  U  F Which is the only letter that occurs twice ?

A. B

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 In the Engish alphabet, which letter will be to the immediate left of M ?

B. L

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 midway between 22nd letter from the left and 21st letter from the right ?

E. NONE OF THESE

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 If every alternate letter starting from B is deleted from the given alphabet, which of the following will be the tenth letter from the right end ?

A. G