1) What is the output for the C#.NET code given below? string s1 = " I AM OK ";string s2;s2 = s1.substring (6, 2);Console.WriteLine (s2); A) AM OK B) AM C) OK D) I AM O Answer: Option CExplanation:Substring() is used to extract substring from the given string. In this condition, it extracts a substring beginning at 6th position with 2 characters.