Q. What will be the output of the following Java program?

class output 
{
    public static void main(String args[])
    { 
       StringBuffer s1 = new StringBuffer("Hello");
       StringBuffer s2 = s1.reverse();
       System.out.println(s2);
    }
}

• (A) Hello
• (B) olleH
• (C) HelloolleH
• (D) olleHHello