Consider the following C code. Assume that unsigned long int type length is 64 bits.unsigned long int fun (unsigned long int n) {unsigned long int i, j = 0, sum = 0 ;for (i = n; i > 1 ; i = i/2)j++ ;for ( ; j > 1 ; j = j/2)sum++ ;return (sum) ;}The value returned when we call fun with the input 240 is

• A. 4
• B. 5
• C. 6
• D. 40