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Delegates

Q1:

Which of the following is the correct way to call the function MyFun() of the Sample class given below? 
class Sample
{
    public int MyFun(int i)
    {
        Console.WriteLine('Welcome to AptitudeCrack.com !' );
        return 0;
    }
}

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

B 
delegate int del(int i);
Sample s = new Sample(.);
del = new delegate(ref MyFun);
del(10);

C 
Sample s = new Sample();
delegate void del = new delegate(ref MyFun);
del(10);

D 
delegate int del(int i);
del d;
Sample s = new Sample();
d = new del(ref s.MyFun);
d(10);

ANS:A - 

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

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