Introduction:
MIDI (Musical Instrument Digital Interface) is a protocol that enables electronic musical instruments, computers, and other devices to communicate and synchronize with each other. It allows for the transmission of musical data such as notes, control changes, and timing information. MIDI has been widely adopted in the music industry and has revolutionized the way music is created and produced.

Explanation:
MIDI was introduced in the year 1983. Here's a detailed explanation of why option 'B' is the correct answer:

The Birth of MIDI:
- In the early 1980s, there was a need for a standardized communication protocol that would allow different electronic musical instruments to work together seamlessly.
- In 1981, a meeting was held by the International Electronic Music Association where Dave Smith, the founder of Sequential Circuits, proposed the idea of a universal interface for electronic musical instruments.
- This idea was further developed in collaboration with other key industry players, including Roland, Yamaha, and Korg.
- In 1983, the MIDI 1.0 specification was released, defining the MIDI protocol and its capabilities.

Key Features of MIDI:
- MIDI uses a serial interface for communication, allowing data to be transmitted and received using a single cable.
- It uses a 5-pin DIN connector for physical connections, which became a standard in the industry.
- MIDI allows for the transmission of various types of musical data, including note on/off messages, control changes, program changes, and more.
- It also supports synchronization and timing information, enabling devices to stay in sync with each other.
- MIDI is a versatile protocol and can be used not only for connecting musical instruments but also for controlling lighting systems, recording automation data, and much more.

Impact and Adoption:
- The introduction of MIDI revolutionized the music industry by enabling musicians to connect and control multiple instruments and devices.
- It allowed for the creation of complex compositions and arrangements without the need for multiple performers.
- MIDI-compatible instruments and equipment quickly became popular, leading to a wide adoption of the standard.
- Today, MIDI is still widely used in studios, live performances, and music production software.

In conclusion, MIDI was introduced in the year 1983 and has since become an essential tool in the music industry, allowing for seamless communication and synchronization between electronic musical instruments and other devices.