Given the following piece of code:
public class School{
public abstract double numberOfStudent();
}
which of the following statements is true?
public class School{
public abstract double numberOfStudent();
}A. The keywords public and abstract cannot be used together.
B. The method numberOfStudent() in class School must have a body.
C. You must add a return statement in method numberOfStudent().
D. Class School must be defined abstract.
Answer: Option D

in a class if any of the method is abstract then that class should be declared abstract