Which forms new compound in air

Options :
  1. water in air
  2. O2 in air
  3. N2 in air
  4. Phosphorus in air
Answer and Explanation :-

Answer: Option 2

Explanation:

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I wish we could sometimes love the characters in real life as we love the characters in romances. There are a great many human souls whom we should accept more kindly, and even appreciate more clearly, if we simply thought of them as people in a story.
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