I’ve done a test and I’d like to know what is the correct answer for the question: *conplete the correct word, please make necessary changes: 8. I would like to have an_______ coat so nobody can see me. What is the correct form of the adjective “invisible”? Just invisible or invisibility? I’d like to know what is the correct answer. Thanks.

I’ve taken a test, and I’d like to know the answer to a question:

Complete the sentence using the correct word; make any changes necessary.

I would like to have an _______ coat so nobody can see me.

Which is the correct form of the adjective “invisible”: just "invisible" or "invisibility"?