Given below are two statements: Statement I: Zn is a constituent of the enzymes carbonic anhydrase (CA), essential for IAA synthesis. Statement II: Rice is an indicator plant of Zn deficiency.

Correct option is A

Zinc (Zn) is an essential micronutrient for plants and plays a key role in enzyme activity, including carbonic anhydrase (CA), which regulates carbon dioxide exchange and IAA synthesis.
· Indole-3-acetic acid (IAA), an essential plant hormone, depends on zinc for its biosynthesis and transport.
· Rice plants are highly sensitive to zinc deficiency and are often used as indicator plants in zinc-deficient soils.
· Symptoms of zinc deficiency in rice include chlorosis, stunted growth, and delayed maturity.
Thus, the correct option is (a) Both Statement I and Statement II are correct.