The correct option is 1, 2 and 3 only.
Explanation
Communication systems in India are broadly classified into personal communication systems (postal, telegraph, telephone) and mass communication systems (radio, television, satellite). These systems have evolved significantly since the early 20th century to facilitate national integration, information dissemination, and economic development.
Statement-wise Analysis:
- Statement 1 is Correct: Radio broadcasting in India began in 1923 by the Radio Club of Bombay. It is considered the oldest mass communication medium in the country. The government subsequently took over the operations, establishing the Indian Broadcasting System in 1930, which was renamed All India Radio (AIR) in 1936 and Akashwani in 1957.
- Statement 2 is Correct: Television broadcasting commenced as an experimental service in Delhi in 1959. For over a decade, the service was restricted to the National Capital Region. Expansion began in 1972 with the establishment of a centre in Bombay (now Mumbai), followed by other major cities. Television services were separated from All India Radio in 1976 to form Doordarshan (DD).
- Statement 3 is Correct: The postal network and telecommunication systems (telephone and telegraph) were the earliest established means for long-distance personal communication. The Indian postal network is the largest in the world, handling distinct categories of mail (first-class and second-class), while the telecom sector has expanded rapidly in the post-liberalization era.
- Statement 4 is Incorrect: The Indian National Satellite System (INSAT) is a multipurpose satellite system. While it is used for television broadcasting and radio networking, it also serves critical functions in telecommunications, meteorological observation, and disaster warning. It is not exclusively used for Doordarshan services.
Key Takeaway:
Radio (started 1923) and Television (started 1959) are the primary mass communication media in India. The INSAT system is a multipurpose platform supporting broadcasting, telecommunications, and meteorology, rather than being dedicated solely to television.