What will be the output of the following C# code?

 static void Main(string[] args)
 {
     int[] a = { 2, 21, 34, 46, 85, 88, 90};
     fun(a);
     Console.WriteLine(a + " ");
     Console.ReadLine();
 }
 static void fun(params int [] b )
 {
     int [] c = { 1, 2, 3, 4, 5, 6, 7};
     int i ;
     for (i = 0 ;i < b.Length ;i++)
     if (b[i] % 2 == 0)
     {
         c[i] = b[i];
     }
     Console.WriteLine("even numbers are:");
     for (i = 0 ;i <= b.Length ;i++)
     {
         Console.WriteLine(c[i]);
     }
 }

A. Compile time error

B. 2, 21, 34, 4, 6, 46, 88, 90

C. 2, 4, 34, 46, 6, 88, 90

D. 2, 34, 46, 88, 90

Answer: Option D