Which gas is used as coolant

Options :
  1. Freyon
  2. Methane
  3. Carbon di oxide
  4. none of the above
Answer and Explanation :-

Answer: Option 1

Explanation:

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There are no happy endings... There are no endings, happy or otherwise. We all have our own stories which are just part of the one Story that binds both this world and Faerie. Sometimes we step into each others stories - perhaps just for a few minutes, perhaps for years - and then we step out of them again. But all the while, the Story just goes on.
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