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Question

Short-day plant among the following is

A
Larkspur
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B
Chrysanthemum
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C
Helianthus
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D
None of the above
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Solution

The correct option is B Chrysanthemum
Short-day plants flower when the night lengths exceed their critical photoperiod. They cannot flower under short nights or if a pulse of artificial light is shone on the plant for several minutes during the night; they require a continuous period of darkness before floral development can begin. For example- Chrysanthemum, cotton, rice, sugarcane, etc.

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