Which sentence uses the word ingenious correctly?

(a) charlotte’s tinkering in her father’s garage led to an ingenious invention.

(b) her childlike personality made natalia appear more ingenious than her peers.

(c) jackson worried that his father would be ingenious when he saw the dented fender.

(d) he may show an unusual ingenious for research, but his lab work is faulty.

Explanation:

I believe it is A. From process of elimination, B doesn’t make sense because if one has a childlike personality, it doesn’t mean one is more ingenious than another. C doesn’t even fit. And D, it doesn’t fit either because ingenious is an adjective, not a noun. So A is the most fitting answer.

By the way, ingenious is a synonym for clever and smart.

Happy Halloween!