Which of the following statements are correct about the deposits of 'methane hydrate'?

1. Global warming might trigger the release of methane gas from these deposits.

2. Large deposits of 'methane hydrate' are found in Arctic Tundra and under the      seafloor.

3. Methane in atmosphere oxidizes to carbon dioxide after a decade or two.

Select the correct answer using codes given below:-

I.A.S. (Pre) 2019