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Which specifier allows to secure the public members of base class in inherited classes?

(a) Private

(b) Protected

(c) Public

(d) Private and Protected

I got this question by my school teacher while I was bunking the class.

My question comes from Public Access Specifier topic in division Access Specifiers of Object Oriented Programming

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The correct choice is (d) Private and Protected

The explanation: Both the private and protected specifiers can make the public members of the base class more secure. This is useful if we stop using the parent class members and use the classes which inherited the parent class, so as to secure data better.

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