Pankaj makes a program to print the product of cubes of the first 10 whole numbers. She writes the following program:

Pankaj makes a program to print the product of cubes of the first 10 whole numbers. She writes the following program:   Asked in C,AMCAT

integer x = 0 // statement 1 
integer sum = 0 // statement 2 
while ( x < 10 ) // statement 3 
{ 
sum = x*x*x // statement 4 
x = x + 1 // statement 5 
} 
print sum // statement 6 
  
Is her program correct? If not, which statement will you modify to correct it? 
a. No error, the program is correct.  
b. Statement 1  
c. Statement 4  
d. statement 6