Q6 What makes a class abstract?
A) The class must not have method definitions.
B) The class must have a constructor that takes no arguments.
C) The class must have a function definition equal to zero.
D) The class which cannot be instantiated as they are mainly for
inheritance.
Iska answer C and D both hona chaiye na because Abstract class must have a pure virtual function (jo statement C kah raha hai), but ans bas D diya hua hai