Two access specifiers in C++ are A. public and private B. int and double C. formal and informal D. void and free

Option B, int and double, are data types. Option C, formal and informal, are not access specifiers. Option D, void and free, are keywords in C++.

Here is a simple example of how public and private access specifiers are used in C++:

“`c++
class Person {
public:
string name;
int age;

private:
string address;
};

int main() {
Person p1;
p1.name = “John Doe”;
p1.age = 30;

// p1.address = “123 Main Street”; // Error: address is private

return 0;
}
“`

In the above example, the name and age of the person are accessible from anywhere in the program, but the address is only accessible from within the Person class.