[Solved] How do we declare an abstract class?

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Q.	How do we declare an abstract class?
A.	by providing at least one pure virtual method (function signature followed by ==0;) in a class
B.	by declaring at least one method abstract using the keyword ‘abstract’ in a class
C.	by declaring the class abstract with the keyword ‘abstract’
D.	it is not possible to create abstract classes in c++
Answer» A. by providing at least one pure virtual method (function signature followed by ==0;) in a class

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