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Discovery of fossils of cyanobacteria indicates that life orginated sometime

Discovery of fossils of cyanobacteria indicates that life orginated sometime

Options

(a) prior to 4600 million years ago
(b) between 4600 and 3600 million years ago
(c) around 3600 million years ago
(d) during some other period

Correct Answer:

around 3600 million years ago

Explanation:

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