Artificial way of causing rainfall to reduce air pollution makes use of

Correct Option: silver iodide and potassium iodide

The correct option is silver iodide and potassium iodide. Cloud seeding, an artificial method of inducing precipitation to wash away air pollutants or combat drought, commonly employs silver iodide (AgI) and potassium iodide (KI) as ice nucleating agents. These chemicals provide crystalline nuclei around which supercooled water droplets can condense and freeze, eventually growing heavy enough to fall as rain. Other options combining nitrates and chlorides lack the specific hexagonal crystal lattice structure necessary for effective ice nucleation in cloud seeding operations.