Devernalisation can be done by:

Dry air

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Heat treatment

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Red light exposure

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Chilling treatment

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Solution

The correct option is B Heat treatment
Certain plants undergo flowering when they are exposed to low temperatures. This phenomenon is called vernalisation. Reversal of the effect of vernalisation is done by subjecting the plants to high temperatures after cold treatment (0-4°C) is called devernalisation. This results in the delay of flowering in the plants.

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