A) IAA
B) IBA
C) ABA
D) 2, 4-D
Correct Answer: D
Solution :
2, 4-D (2, 4-dichloro phenoxy acetic acid) is a synthetic auxin. It is selective weedicide and kill broad leaved dicot weed plant only like chenopodium in wheat field. IBA, a synthetic auxin induces rooting of cuttings, IAA is a well known natural auxin. ABA is natural plant growth regulator.
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