A) indole-3-acetic acid
B) gibberellic acid
C) 2, 4-dichlorophenoxyacetic acid
D) maleic hydrazide
Correct Answer: C
Solution :
A high concentration of synthetic auxins like2, 4-D (2, 4-dichlorophenoxyacetic acid) and 2, 4, 5-T (2, 4, 5-trichlorophenoxy acetic acid, destroy the dicot weeds (not the monocot weeds).
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