How many 4letter code can be formed using the first 9 letters of the English alphabets, if no letter can be repeated?

How many 4letter code can be formed using the first 9 letters of th

1.	How many 4letter code can be formed using the first 9 letters of the English alphabets, if no letter can be repeated?
A.	3024
B.	3036
C.	3021
D.	3034
Answer» B. 3036