90.Which of the following will be the correct output for the C#.NET code snippet given below?

String s1 = "Nagpur";
String s2;
s2 = s1.insert(6, "Mumbai");
Console.WriteLine(s2);
A.NagpuMumbair
B.Nagpur Mumbai
C.Mumbai
D.Nagpur
E.NagpurMumbai
Answer: Option E