The correct answer is D. Doordarshan.
Gyan Vani is an educational radio service of All India Radio (AIR), the national public radio broadcaster of India. It was launched in 1967 with the objective of providing educational programs to the masses. The service broadcasts a variety of programs on a wide range of subjects, including science, technology, agriculture, health, and education. Gyan Vani is available on both AM and FM frequencies, and it can also be accessed online.
Zee TV is a Hindi-language general entertainment television channel owned by Zee Entertainment Enterprises. It was launched in 1992 and is one of the most popular television channels in India. Zee TV broadcasts a variety of programs, including soap operas, reality shows, and game shows.
Sony TV is an Indian Hindi-language general entertainment television channel owned by Sony Pictures Networks India. It was launched in 1995 and is one of the most popular television channels in India. Sony TV broadcasts a variety of programs, including soap operas, reality shows, and game shows.
Doordarshan is an Indian public service broadcaster. It is the largest terrestrial television network in the world, with over 900 million viewers. Doordarshan broadcasts a variety of programs, including news, entertainment, and educational programs.