Pineapple can be made to flower in off season by the application of

zeatin

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ethylene

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short-days

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low temperature

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Solution

The correct option is B ethylene
Ethylene is known to initiate flowering even in off seasons in plants such as pineapple and mango. It also initiates synchronising fruit-set in pineapples.

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Unseasonal flowering in pineapple may be achieved by the application of

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