Select the code snippet which returns the top of the stack.

A.

public int top()
{
       if(q1.size()>0)
       {
            return q1.poll();
       }
       else if(q2.size()>0)
       {
            return q2.poll();
       }
       return 0;
}

B.

public int top()
{
       if(q1.size()==0)
       {
            return q1.peek();
       }
       else if(q2.size()==0)
       {
            return q2.peek();
       }
        return 0;
}

C.

public int top()
{
       if(q1.size()>0)
       {
            return q1.peek();
       }
       else if(q2.size()>0)
       {
            return q2.peek();
       }
       return 0;
}

D.

public int top()
{
       if(q1.size()>0)
       {
            return q2.peek();
       }
       else if(q2.size()>0)
       {
            return q1.peek();
       }
       return 0;
}

Answer: Option C