Q. What is the output of this program?

#include 
    using namespace std;
    int main()
    {
        int k;
        enum Month {
            January = 1, February ,March, April, May, June, July, August, September, October, November, December
        };
        for (k = April; k <= September; k++)
            cout << k;
        return 0;
    }

• (A) 456789
• (B) 0123456789101112
• (C) 0123456
• (D) 89101112