Which of the following sets does not include all natural plant growth regulators?
Which of the following sets does not include all natural plant growth regulators?
$\mathrm{GA}_3$, IAA, Zeatin
IAA, Kinetin, Zn
$\mathrm{ABA}, \mathrm{GA}_7, \mathrm{GA}_3$
$\mathrm{ABA}, \mathrm{GA}_3, \mathrm{IAA}$
Solution
Plant growth regulators are small, simple molecules of diverse chemical composition, which in low concentration regulate growth, differentiation and development by promoting or inhibiting the same. Kinetin is a synthetic cytokinin and zinc $(\mathrm{Zn})$ is not a natural plant growth regulator.