Which of the following statements are correct about functions used in C#.NET? 1.Function definitions cannot be nested. 2.Functions can be called recursively. 3.If we do not return a value from a function then a value -1 gets returned.

• A. 2, 3, 5
• B. 1, 2, 5
• C. 4, 5
• D. 2, 3