If any two letters in the word  'PRISON' have as many letters between them in the word as there are in the English alphabet, they form an alpha-pair. How many such alpha-pairs are there in the word 'PRISON' ?

A. Nil
B. 1
C. 2
D. 3
E. More than 3
Answer: E . More than 3


Letters in the word Letters in the alphabet
P  R  I  S P  Q  R  S
R  I  S  O R  Q  P  O
R  I  S  O  N R  Q  P  O  N
O  N O  N