C++ MQCs with Explanation (CHAPTER : POINTERS, VIRTUAL FUNCTIONS AND POLYMORPHISM

consider the following class definition: class Test { public : void show (void) {cout <<”Test”;} }; If x is an object of Test and ptr is a pointer to x, then which one of the following statements can correctly invoke the function show ( )?

1. x.show ( ) ;
2. ptr -> show ( ) ;y
3. (*ptr). show ( );
4. all the three

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Answer: 

Option d: all the three

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Explanation Here