Which of the following is antitranspirant?

A. Phenyl Mercuric Acetate (PMA)

B. Abscisic Acid (ABA)

C. Both A and B

D. Malic Hydrazide (MH)

Answer: Option C

Solution(By Examveda Team)

Phenyl Mercuric Acetate (PMA) and Abscisic Acid (ABA) are antitranspirant.
Antitranspirants are compounds applied to the leaves of plants to reduce transpiration.
Fungicides like phenyl mercuric acetate (PMA) and herbicides like atrazine in low concentrations serve as antitranspirants by inducing stomatal closing.
Abscisic acid will cause the flow of K+ ions from the guard cells and end in the closure of the stomata. Therefore, this is also categorize as antitranspirant.