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UPSC Prelims 1994Question 122Science & Technology

Which one of the following is in the correct sequential order in which these appeared under simulated primitive earth condition ?

Options

  1. (a)Methane, Hydrogen cyanide, nitriles, amino-acids
  2. (b)Hydrogen cyanide, methane, nitriles, amino-acids
  3. (c)Amino-acids, nitriles. Hydrogen cyanide, methane
  4. (d)Nitriles, amino-acids, methane, Hydrogen cyanide

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