A) Xanthium
B) Soybean
C) Wheat
D) Tobacco
Correct Answer: C
Solution :
Long Day Plants (LDP) require a photoperiod of more than a critical length, which may vary from 4 to 18 hours. The best flowering of long day plants usually occurs in continuous light. For flowering they require either no dark period or a very short dark period. Example of long day plants are wheat, maize, oats, spinach etc.
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