Question

Which of the following is NOT a naturally occurring auxin?

a.

Indole 3-acetic acid (IAA)

b.

Indole 3-butyric acid (IBA)

c.

Phenyl acetic acid (PAA)

d.

2,4-D

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Answer: (d).2,4-D

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Q. Which of the following is NOT a naturally occurring auxin?

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