The smell of fresh rain (petrichor) comes from

The chemicals released by plants

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The chemicals released by bacteria

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The chemicals present in soil

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All of the above

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Solution

The correct option is B
The chemicals released by bacteria

Petrichor is the term used to describe the earthy scent produced during a rainfall on dry soil. The chemicals released by bacteria in the soil after a spell of fresh rain create the distinctive petrichor scent.

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