Which of the following is the correct sequence of events in the origin of life? I. Formation of ...

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Which of the following is the correct sequence of events in the origin of life?
I. Formation of protobionts
II. Synthesis of organic monomers
III. Synthesis of organic polymers
IV. Formation of DNA-based genetic systems
(a) II, III, I, IV
(b) II, III, IV, I
(c) I, II, III, IV
(d) I, III, II, IV
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