If it is possible to make only one meaningful English word with the second, the third, the seventh and the eighth letters of the word STEADFAST, which of the following will be the second letter of that word ? If no such word can lie formed. give ‘X’ as the answer and if more than one such word can be formed, give ‘Y’ as the answer.

A

E

B

A

C

T

D

X

E

Y