Which of the following is the correct output of the C#.NET code snippet given below? int a = new int; a = new int{6, 1, 4, 3}; a = new int{9, 2, 7}; Console.WriteLine(a.GetUpperBound(0));

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

int[][] a = new int[2][];
a[0] = new int[4]{6, 1, 4, 3};
a[1] = new int[3]{9, 2, 7};
Console.WriteLine(a[1].GetUpperBound(0));