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One of the synthetic auxin is :
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- IAA
- GA
- IBA
- NAA
Correct Option: D
NAA is a synthetic auxin. Some of the most widely used weed killers are synthetic auxins. Synthetic auxin analogs include 1–naphthaleneacetic acid (NAA), 2, 4-dichlorophenoxy acetic acid (2, 4-D) and 2,4,5-trichlorophenoxy acetic acid (2,4,5- T).
