A) ethylene
B) cytokinin
C) gibberellic acid
D) abscisic acid
Correct Answer: A
Solution :
Ethylene is the only gaseous hormone. Main roles of ethylene are as follows (1) It helps in ripening of fruits like mango, banana etc. Due to this property, it is popularly known as ripening hormone. (2) It accelerates apical dominance, senescence of leaves and flowers. (3) It inhibits geotropism, flowering etc.
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