Answer:
The correct syntax for declaring a class that is derived from a base class in C++ is:
class childclass : public baseclass
{
// class definition
};
The other answer choices are not correct syntax for declaring a derived class in C++.
Step-by-step explanation:
This syntax tells the compiler that the class childclass is derived from the base class baseclass and is allowed to access the public members of baseclass. The : and public keywords are used to specify the inheritance relationship, and the class definition is enclosed in curly braces { }.
The other answer choices are not correct syntax for declaring a derived class in C++.