What will be the output of the given code snippet?

class math

{

public int fact(int n)

{    int result;

result = fact(n -1)* n;

return result;

}

}

class Program

{

staticvoid Main(string[] args)

{

maths obj =new maths();

Console.WriteLine(obj.fact(4));

Console.ReadLine();

}

}

c) Compile time error

d) Runtime Error