ANSWER : A

Explanation :

float a = 3.26;    printf("%f",ceil(a));

"ceil()" function present in the header file "math.h" rounds up the value of "a" from "3.26" to "4.0".

Notes :

"floor()" function does the opposite of "ceil()" function .i.e "floor()" function rounds down the value.

For example : 3.26 to 3.0