Which of the following ways to create an object of the Sample class given below will work correctly?

class Sample
{
    int i;
    Single j;
    double k;
    public Sample (int ii, Single jj, double kk)
    {
        i = ii;
        j = jj;
        k = kk;
    } 
}

Sample s1 = new Sample(); 
Sample s2 = new Sample(9, 5.6f);

public Sample()
{
    i = 0; 
    j = 0.0f;
}
public Sample (int ii, Single jj)
{
    i = ii;
    j = jj;
}

public Sample (Optional int ii = 0, Optional Single jj = 0.0f)
{
    i = ii;
    j = jj;
}

public Sample (int ii, Single jj)
{
    i = ii;
    j = jj;
}

Sample s;

s = new Sample();

namespace CuriousTabConsoleApplication
{ 
    class Sample
    { 
        static Sample()
        { 
            Console.Write("Sample class ");
        }
        public static void CuriousTab1()
        { 
            Console.Write("CuriousTab1 method ");
        } 
    } 
    class MyProgram
    { 
        static void Main(string[ ] args)
        { 
            Sample.CuriousTab1();
        } 
    } 
}

namespace CuriousTabConsoleApplication
{
    class Sample
    { 
        public static void fun1()
        { 
            Console.WriteLine("CuriousTab1 method");
        }
        public void fun2()
        { 
            fun1(); 
            Console.WriteLine("CuriousTab2 method");
        }
        public void fun2(int i)
        { 
            Console.WriteLine(i);
            fun2(); 
        } 
    } 
    class MyProgram
    { 
        static void Main(string[ ] args)
        { 
            Sample s = new Sample(); 
            Sample.fun1(); 
            s.fun2(123);
        } 
    } 
}

Tab1 method 
123
Tabl method 
Tab2 method

Tab1 method 
123
Tab2 method

Tab2 method 
123
Tab2 method 
Tabl method

Tabl method
123

Tab2 method 
123
Tabl method

1. An argument passed to a ref parameter need not be initialized first.
2. Variables passed as out arguments need to be initialized prior to being passed.
3. Argument that uses params keyword must be the last argument of variable argument list of a method.
4. Pass by reference eliminates the overhead of copying large data items.
5. To use a ref parameter only the calling method must explicitly use the ref keyword.

1. Type of arguments
2. Return type of methods
3. Number of arguments
4. Names of methods
5. Order of arguments

class Sample
{
    static int i;
    int j;
    public void proc1()
    {
        i = 11; 
        j = 22;
    }
    public static void proc2()
    {
        i = 1;
        j = 2;
    }
    static Sample()
    {
        i = 0; 
        j = 0;
    }
}