FUNCTIONS, CONSTRUCTOR, DESTRUCTOR & OVERLOADING QUESTIONS IN C++. (1)

Answer the questions (i) and (ii) after going through the following class:

class Vehicle
{
int VehicleNo, Track;
public:
Vehicle(); //Function1
Vehicle(int VH); //Function2
Vehicle(Vehicle &V); //Function3
void Allocate(); //Funciton4
void Move(); //Function5
};

void main()
{
Vehicle V;
:
:
}

(i) Out of the following, which option is correct for calling Function2?
(ii) Name the feature of object oriented programming which is illustrated Function1, Function2, Function3 combined together.