Correct option is D
A basic communication system consists of three essential components: a transmitter, a receiver, and an antenna. The transmitter converts the information into signals and transmits them over a medium. The receiver receives these signals and converts them back into understandable information. The antenna is required to radiate the transmitted signals and capture the incoming signals. However, Internet is not a mandatory component of every communication system. While the Internet is a medium for digital communication systems, traditional communication systems like radio, television broadcasting, and analog telephony do not require the Internet to function. The Internet has become an essential part of modern communication, but it's not an intrinsic part of all communication setups.
