1. If your answer is right, you will get one point.

2. If you answer the question right, you will get one point card.

3. If you answer the question rightly, ou will get one point card.
(Which sentence is right?)

#1 is the best, and #2 is fine, too. #3 is incorrect.

The correct sentence is: "If you answer the question right, you will get one point card."

The correct sentence is:

2. If you answer the question right, you will get one point card.

To determine the correct sentence, we need to consider grammar and correctness. In this case, the word "right" is used as an adverb to modify the verb "answer." Adverbs in English do not change their form, so "right" is the correct adverb to use here. Therefore, sentence 2 is grammatically correct. Sentences 1 and 3 contain grammatical errors by using "rightly" instead of "right."