correct answer Which of this keyword must be used to inherit a class?Optionssuperextendthisextends

To determine the correct keyword used for class inheritance in programming, particularly in languages like Java and C#, let's analyze the options provided.

1. super: This keyword is typically used to call a superclass's constructors or methods from a subclass. It is not used for inheritance itself.

2. extend: Although this seems relevant, it's not a keyword that actually exists in programming languages for inheritance. Specifically, in Java, the word "extend" doesn't stand alone as a keyword but is part of the actual usage.

3. this: This keyword refers to the current instance of the class and is not related to inheritance.

4. extends: This is the correct keyword used in Java (and in other languages) to denote that one class is inheriting from another. For example, in Java, you would declare a subclass like this:

   class SubClass extends SuperClass {
   }
   

Conclusion

The correct answer is extends.