Broadcasting and Television Media

This is the correct order.

Operation Duryodhan was a famous sting operation conducted in 2005 by Aaj Tak news channel, which caught 11 members of Parliament accepting bribes to raise questions in the Lok Sabha. The operation exposed corruption in the Indian legislative system.

Correct answer is (2). 

IPTV stands for Internet Protocol Television, which delivers television content over IP networks instead of traditional terrestrial, satellite, or cable formats. It allows streaming media through internet connections.

A modem (modulator-demodulator) converts digital signals to analog for transmission over telephone lines (modulation) and converts received analog signals back to digital (demodulation). This bidirectional conversion enables digital devices to communicate over analog channels. Satellites, fiber optics, and coaxial cables are transmission media, not devices that perform modulation/demodulation.

Worldspace was a satellite radio service provider that operated in Asia and Africa, offering subscription-based radio services. The other options (broadband, telephone) are different communication services entirely.

A television is an electronic device designed to transmit and receive moving images and sound. It converts electrical signals into visible moving images, typically using wireless waves or cable transmission. The other options refer to different instruments: voltmeter measures potential difference, and transistor performs functions of a thermionic valve.

IPTV (Internet Protocol Television) is a service that delivers television content over Internet Protocol networks. This allows users to access internet-based television services on their TV sets, unlike traditional broadcast, cable, or satellite television.

Optical fiber cables use light (typically from lasers or LEDs) as the carrier of information, transmitted through glass or plastic fibers by total internal reflection. Light signals travel at near-light speed through these fibers, enabling enormous bandwidth over long distances with minimal signal loss. This technology revolutionized telecommunications, enabling high-speed internet, cable TV, and global communications infrastructure.

An aerial (antenna) is specifically designed to capture electromagnetic waves of particular frequencies broadcast by radio or TV stations. It converts these waves into electrical signals. Wires conduct signals and modems modulate digital data, but don't capture broadcast waves.

UHF (Ultra High Frequency) band spans from 300 MHz to 3000 MHz (3 GHz) as defined by international radio frequency allocations. Option B describes a broader range that includes VHF, while options C and D are incorrect ranges. UHF is used for various applications including aviation communication, television broadcasting, and mobile phones.

DTH (Direct To Home) is a digital satellite television broadcasting technology. It delivers television signals directly to individual subscribers' satellite dishes, bypassing cable distribution systems. While it involves communication technology, its primary application is television broadcasting.

Direct To Home

VDU stands for Visual Display Unit, which is the technical term for a computer monitor or screen that displays visual output. Options A and D are plausible-sounding but incorrect expansions of the acronym. Option C contains an unrelated word that has nothing to do with display technology.