Which of the following statements are correct about functions and subroutines used in C#.NET? 1 A function cannot be called from a subroutine. 2 The ref keyword causes arguments to be passed by reference. 3 While using ref keyword any changes mad

Which of the following statements are correct about functions and subroutines used in C#.NET?

1 A function cannot be called from a subroutine.

2 The ref keyword causes arguments to be passed by reference.

3 While using ref keyword any changes made to the parameter in the method will be reflected in that variable when control passes back to the calling method.

4 A subroutine cannot be called from a function.

5 Functions and subroutines can be called recursively.