If a is the number of ways of selecting 3 vowels, 2 consonents, b is the number of ways of selecting 2 vowels, 3 consonents and c is the number of ways of selecting 4 vowels, 1 consonent from the letters of the word EQUATION then descending order of a, b, c is

Options

A. a, b, c
B. b, c, a
C. c, a, b
D. a, c, b

Answer

D