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B
Guttation
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C
Bleedling
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D
Gaseous exchange
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Solution
The correct option is A Gaseous exchange Lenticel is a pore found in the epidermis of leaves,stem and other organs that are used to control gas exchange. It provides a way for the exchange of gases like carbon dioxide, oxygen and water vapour with the atmosphere through the bark, which is otherwise impermeable to gases.