Question

Synthetic plant hormone is

• A. IAA
• B. 2, 4-D/NAA
• C. GA
• D. Zeatin

Answer 1

The correct option is B 2, 4-D/NAA

There are several plant hormones which regulates the plant growth. Hormones like gibberellic acid (GA), Indoleacetic acid (IAA), a type of auxin, zeatin, most common type of cytokinin are growth promoter. Hormones like Abscisic Acid (ABA), ethylene are growth inhibitor. Naphthaleneacetic acid (NAA) and 2,4-D hormones are synthetic hormones. NAA promotes growth whereas 2,4-D act as weedicide .

Thus, the correct answer is option B.