What will be the output of the following C++ code?

#include <iostream>
using namespace std;
 
class A 
{
   int a;
   A() { a = 5;}
};
 
int main()
{
    A *obj = new A;
    cout << obj->a;
}

A. class B. struct C. typedef D. interface

A. Encapsulation B. Polymorphism C. Inheritance D. Instantiation

A. The process of creating multiple instances of a class B. The process of hiding the implementation details of a class C. The process of deriving a new class from an existing class D. The process of defining functions within a class

A. protected B. public C. friend D. None of the above