Option a consists of all fundamental types, option b consists of user-definied types and option d consists 

of derived types but option c is a mixture.

Extensible is used to add new features to C++.

The given value is with decimal points, so float or double can be used.

The argument that is passed to a function f is of float type and the function finally retruns a value

that id is of integer type.

They must be defined by the users before use unlike the other types which are readily available.

Logical values can be either true or false, so the boolean type is suited for it.

Because a is used to produce a beep sound.

Array type is not the basic type and it is constructed using the basic type.

void will not return anything.

Compiler wants to make CPU as more efficient in accessing the next value.