Which of the following is true about private access modifier $?$

Select One

a$.$ Variables, methods and constructors which are declared private can be accessed only by the members of the same class.

b$.$ Variables, methods and constructors which are declared private can be accessed by any class lying in same package.

c$.$ Variables, methods and constructors which are declared private in the superclass can be accessed only by its child class.

d$.$ None of the above.