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Delegates - Programming

Q1:

Which of the following is the correct way to call subroutine MyFun() of the Sample class given below? 
class Sample
{
    public void MyFun(int i, Single j)
    {
        Console.WriteLine('Welcome to AptitudeCrack !');
    }
}

A 
delegate void del(int i);
Sample s = new Sample();
del d = new del(ref s.MyFun);
d(10, 1.1f);

B 
delegate void del(int i, Single j);
del d;
Sample s = new Sample();
d = new del(ref s.MyFun);
d(10, 1.1f);

C 
Sample s = new Sample();
delegate void d = new del(ref MyFun);
d(10, 1.1f);

D 
delegate void del(int i, Single]);
Sample s = new Sample();
del = new delegate(ref MyFun);
del(10, 1.1f);

ANS:A - 

delegate void del(int i);
Sample s = new Sample();
del d = new del(ref s.MyFun);
d(10, 1.1f);

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