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Question

Roots will absorb water when external medium will be

A
Hypotonic
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B
Hypertonic
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C
Isotonic
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D
Concentrated
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Solution

The correct option is A Hypotonic
Osmosis happens along a concentration gradient. If outside medium is hypotonic, it means that relatively more of water is present outside the cells in the surrounding medium and water will flow inside the root hair cells.
So, the correct answer is 'Hypotonic'

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