Yes, well, indeed. Sorry, I'm afraid that's the wrong answer. It's actually b)gelotology – which comes from the Greek word, gelos, meaning laughter.

是的，确实。很遗憾，恐怕你的答案是错的。答案实际上是b) gelotology，这个词来自希腊语中的gelos，它是“笑”的意思。