If a and b are integer numbers which is greater then one, which of the following CANNOT be the value of ab?  Choices:
A) 9
B) 14
C) 21
D) 23
E) 25
23 is a prime number itself and so cannot be multiple of two prime numbers which is greater then one..   ans 23
<result>D</result>
If a and b are integer numbers which is greater then one, which of the following CANNOT be the value of ab?