How many pairs of letters are there in the word 'CLANGOUR' which have as many letters between them in the word as in the alphabet ?

Answer: E. None of these
Letters in the word Letters in the alphabet
C  L  A C  B  A
C  L  A  N  G C  D  E  F  G
L  A  N L  M  N
L  A  N  G  O  U  R L  M  N  O  P  Q  R
N  G  O  U  R N  O  P  Q  R