1. What's the matter?

2. What's worry?
3. What's the worry?

*Which ones are correct? Between 2 and 3, which one is correct?

Sorry, #1 and #3 are gramatically correct. #2 is also correct with the contraction = What is worry. = asking for a definition.

Sra

#1 is grammatically correct and the most commonly used.

#2 and #3 are grammatically correct, but not commonly used.

Between sentences 2 and 3, both are grammatically correct, but they have slightly different meanings.

Sentence 2 - "What's worry?" - is not a complete sentence on its own. It is a fragment and does not convey a clear meaning. It may be a typo or an incomplete thought.

Sentence 3 - "What's the worry?" - is a complete sentence and grammatically correct. Here, "the worry" refers to a specific concern or issue that is being discussed or mentioned. The speaker is asking about the specific worry or concern.

As for Sentence 1 - "What's the matter?" - it is also grammatically correct, but it has a slightly different meaning than the other two sentences. "What's the matter?" is a common phrase used to ask someone if something is wrong or if they are experiencing any problems or difficulties.

Therefore, if you are trying to ask about a specific concern or issue, Sentence 3 - "What's the worry?" - would be the correct option.