OOP (course 3): Inheritance, Abstract Classes, Interfaces and other amazing things

Abstract Classes

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Challenge 1 / 3

Check out these classes that the intern created, which all have confusing names:

abstract class OtherClass extends GreatClass
{
}

abstract class SomeClass extends OtherClass
{
}

class GreatClass
{
}

class MyClass extends OtherClass
{
}

class Puppy extends SomeClass
{
}

function doSomething(OtherClass $thing)
{
    // ...
}

Based on the type-hint, objects of which classes could be passed to the doSomething() function?

OtherClass and SomeClass

OtherClass and MyClass

MyClass and Puppy

OtherClass and GreatClass