The correct answer is option 'A' which states that the radio frequency region of the electromagnetic spectrum used for broadcasting is around 106 Hz. Let's explore the details behind this answer:

Explanation:
The electromagnetic spectrum is a range of all possible frequencies of electromagnetic radiation. It includes various regions such as radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays. Each region has a specific range of frequencies and unique properties.

Radio waves are a type of electromagnetic radiation with long wavelengths and low frequencies. They are used for various purposes, including communication, broadcasting, and navigation. The radio frequency region of the electromagnetic spectrum is specifically allocated for broadcasting purposes.

Key Point:
The radio frequency region used for broadcasting is around 106 Hz.

Importance of Radio Waves in Broadcasting:
Radio waves have several characteristics that make them suitable for broadcasting:

1. Long Wavelength: Radio waves have longer wavelengths compared to other forms of electromagnetic radiation. This allows them to propagate over long distances without significant attenuation or loss of signal strength. It enables radio signals to reach a wide audience across large geographical areas.

2. Penetration: Radio waves have the ability to penetrate through obstacles such as buildings and foliage. This makes them ideal for indoor reception, especially in urban areas where tall buildings may obstruct the line of sight.

3. Modulation: Radio waves can be easily modulated to carry information. Modulation techniques such as amplitude modulation (AM) and frequency modulation (FM) are used to encode audio signals onto radio waves for broadcasting purposes.

Types of Broadcasting:
Broadcasting refers to the distribution of audio and video content to a large audience. It can be categorized into two main types:

1. AM Radio Broadcasting: AM radio broadcasting uses amplitude modulation to encode audio signals onto radio waves. AM radio stations typically operate in the frequency range of 540 kHz to 1600 kHz (kilohertz).

2. FM Radio Broadcasting: FM radio broadcasting utilizes frequency modulation to encode audio signals onto radio waves. FM radio stations generally operate in the frequency range of 88 MHz to 108 MHz (megahertz).

Conclusion:
In conclusion, the radio frequency region of the electromagnetic spectrum used for broadcasting is around 106 Hz. Radio waves have unique properties that make them suitable for broadcasting purposes, including their long wavelength, ability to penetrate obstacles, and modulation capabilities. AM and FM radio broadcasting are the two main types of broadcasting within the radio frequency region.