C is true and hence the ans Abstract classes may not be instantiated
Option A false because
|A method that is declared as abstract and does not have implementation is known as abstract method.
Abstract classes are classes that contain one or more abstract methods.
Option D is false because :-
Anabstract method is a method that is declared, but contains no implementation.
Abstract classes may not be instantiated, and require subclasses to provide implementations for the abstract methods.
Option B is not false either but A seems to be more appropriate