What is the output of the following program? #include int max_num(int a,int b) if(a> b) return a; return b; int maximum_subarray_sum(int *arr, int len) int sum[len], idx; sum[0] = arr[0]; for(idx = 1; idx mx) mx =sum[idx]; return mx; int main() int arr[] = -20, 23, 10, 3, -10, 11, -5,len = 7; int ans = maximum_subarray_sum(arr, len); printf("%d",ans); return 0;

Answer: Option B