Assertion (A): The function f(x) = $x^3-3x^2+6x-100$ is strictly  increasing on R 
Reason (R) : A strictly increasing functions is an injective function 
 

Both A and R are true and R is the correct explanation of A

A is false but R is true

Both A and R are true but R is NOT the correct explanation of A

A is true but R is false