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

using System;
namespace CuriousTabConsoleApplication
{
    class MyProgram
    {
        static void Main(string[] args)
        {
            int index = 6;
            int val = 44;
            int[] a = new int[5];
            try
            {
                a[index] = val ;
            }    
            catch(IndexOutOfRangeException e)
            {
                Console.Write("Index out of bounds ");
            }
            Console.Write("Remaining program");
        }
    }
}

1. A class
2. A property
3. A struct
4. A function
5. An interface

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

namespace CuriousTabConsoleApplication
{ 
    class SampleProgram
    {
        static void Main(string[] args)
        { 
            int num = 1;
            funcv(num); 
            Console.Write(num + ", "); 
            funcr(ref num); 
            Console.Write(num + ", ");
        }
        static void funcv(int num)
        { 
            num = num + 10; Console.Write(num + ", ");
        }
        static void funcr (ref int num)
        { 
            num = num + 10; Console.Write(num + ", ");
        } 
    } 
}

1. true
2. false
3. new
4. ~
5. sizeof