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' ?

E. MORE THAN 3

In the following question, arrange the given names in the order in which they would occur in a telephone directory and choose the one which appears in the middle.

C. AWADESH

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 is the letter as far from the first letter of the alphabet given below as the letter C is from the letter midway between K and R in 'QUICKSILVER' ?

D. J

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

D. MORE THAN THREE

The letters skipped in between the adjacent letters in the series are followed by equal space.
Which of the following series observes this rule ?

C. RVZDHL