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

Answer 1

Answer:

D. 2,4-D

• 2, 4-D is an organic compound and is known as synthetic auxin which is marketed as a herbicide.