Number of Unguided Media is:

Answer: Option D

Unguided Media: Unguided media refer to the transmission media that do not require any physical conductor or wire. These are primarily used for wireless communication.

There are three main types of unguided media:

1. Radio waves: These are used for long-range communication like broadcasting and mobile communication.
2. Microwaves: These are used for point-to-point communication and satellite communications.
3. Infrared: This is used for short-range communication, such as remote controls and wireless data transfers.

Therefore, the correct answer is Option D: 3 types of unguided media in network communication.