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2nd April Quiz
Attempt the question and click Next to continue.
MCQ
GS
1. Which of the following gases was/were present in the thin atmosphere that planet earth had initially?
I. Methane.
II. Hydrogen.
III. Helium.
IV. Oxygen.
(a) Only I and II
(b) Only II and III
(c) Only III and IV
(d) I, II, III and IV
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