(B) Allethrins

Allethrins are active chemicals commonly used in mosquito repellents and insecticides to deter or eliminate mosquitoes. They belong to a class of synthetic pyrethroid insecticides, which are designed to mimic the insecticidal properties of pyrethrins, natural insecticides derived from chrysanthemum flowers. These chemicals are effective in repelling and killing mosquitoes and other insects. The other options (Benzene Hexachlorophene, Atropine, and 2-Isopropoxiphimyal) are not typically used for mosquito control.

(C) Devika Rani

Devika Rani, the renowned actress, was the first woman to receive the Dadasaheb Phalke Award. She was honored with this prestigious award in 1969 for her significant contributions to Indian cinema.

Copenhagen is the capital and largest city of Denmark, located on the eastern coast of the island of Zealand. It is a cultural, economic, and governmental hub of Denmark. The city is known for its historical architecture, vibrant cultural scene, and being a center for innovation and sustainability. Copenhagen is also a major port city and a popular destination for tourists.

World No Tobacco Day is organized every year on 31 May by the World Health Organization to promote awareness about the risks related to consumption of tobacco and its products and its ill effects on family, society and environment.