A) indole 3-acetic acid
B) gibberellic acid
C) 2, 4-dichlorophenoxyacetic acid
D) malic hydrazide
Correct Answer: C
Solution :
\[2,\,4-D\](2, 4-dichlorophenoxy acetic acid) is a synthetic auxin. It is used to kill dicot weeds among the monocot (cereal) crops as the latter remains unaffected.
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