Which of the following statements are correct about subroutines used in C#.NET? If we do not return a value from a subroutine then a value -1 gets returned. Subroutine definitions cannot be nested. Subroutine can be called recursively. To return the control from middle of a subroutine exit subroutine should be used. Subroutine calls can be nested.

• 1, 2, 3
• 2, 3, 5
• 3, 5
• 3, 4
• None of these