Which of the following statements is correct about the C#.NET code snippet given below?

short s1 = 20;
short s2 = 400;
int a;
a = s1 * s2;

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();
        } 
    } 
}

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();

short s1 = 20;
short s2 = 400;
int a;
a = s1 * s2;

int a = 1, b = 2, c = 0;
if (a < b) c = a;

int a = 1, b = 2, c = 0;
c = a < b ? a : 0;

int a = 1, b = 2, c = 0;
a < b ? c = a : c = 0;

int a = 1, b = 2, c = 0;
a < b ? c = a : c = 0 ? 0 : 0;

int a = 1, b = 2, c = 0;
a < b ? return (c): return (0);

int a = 1, b = 2,c = 0;
c = a < b : a ? 0;

public class MyContainer<T> where T: IComparabte
{
    // Insert code here
}

1. Class MyContainer requires that it's type argument must implement IComparabte interface.
2. Type argument of class MyContainer must be IComparabte.
3. Compiler will report an error for this block of code.
4. This requirement on type argument is called as constraint.

struct Address
{
    private int plotno;
    private String city; 
}
Address a = new Address(); 
Address b; 
b = a;

1. It is a keyed collection.
2. It is a ordered collection.
3. It is an indexed collection.
4. It implements a IDictionaryEnumerator interface in its inner class.
5. The key - value pairs present in a HashTable can be accessed using the Keys and Values properties of the inner class that implements the IDictionaryEnumerator interface.

    int[] a = {11, 3, 5, 9, 4}; 

1. The array elements are created on the stack.
2. Refernce a is created on the stack.
3. The array elements are created on the heap.
4. On declaring the array a new array class is created which is derived from System.Array Class.
5. Whether the array elements are stored in the stack or heap depends upon the size of the array.