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

class output 
{
    public static void main(String args[])
    { 
       StringBuffer s1 = new StringBuffer("Hello");
       s1.setCharAt(1,'x');
       System.out.println(s1);
    }
}

• (A) xello
• (B) xxxxx
• (C) Hxllo
• (D) Hexlo