Option B is true because the  unbind()  method is invoked from within a widget’s object  1 .

Option D is true because the  unbind()  method needs the event name as an argument  1 .

The  unbind()  method in Tkinter is used to remove a binding between an event and a function. It can be invoked from within a widget's object when a binding is no longer needed. The method requires the event name as an argument to remove the binding for that specific event. For example:

button = tk.Button(root, text="Click me")

button.bind(" < Button-1 > ", callback_function) # bind left mouse click event to callback_function

button.unbind(" < Button-1 > ") # remove the binding for the left mouse click event