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 the code given below.

All statements are correct because methane hydrates are temperature-sensitive crystalline solids found in permafrost and marine sediments, and atmospheric methane typically oxidizes into carbon dioxide within 10–12 years. Option (a) is the most tempting wrong choice as candidates often doubt the specific atmospheric residence time or the chemical fate of methane, yet its relatively short lifespan and conversion to CO2 are well-documented. The core concept tested is the environmental stability of methane clathrates and the atmospheric behavior of greenhouse gases.