Explanation:

Introduction:
In this question, we are given four options - Radio, Fan, Torch, and None. We need to identify which option does not contain a magnet.

Magnets:
Before we proceed to find the correct answer, let's understand what a magnet is. A magnet is an object that produces a magnetic field. It has two poles - north and south. Like poles repel each other, while opposite poles attract each other.

Options:
Let's analyze each option to determine if it contains a magnet or not.

a) Radio:
A radio is an electronic device that receives radio waves and converts them into sound. Radios do not contain magnets. The sound in a radio is produced by electrical signals, not magnets.

b) Fan:
A fan is a device used for creating airflow. It typically consists of blades that rotate to circulate air. Some fans may contain magnets, particularly those with brushless motors. However, not all fans have magnets. There are various types of fans, including those with traditional motors that do not rely on magnets.

c) Torch:
A torch, also known as a flashlight, is a portable hand-held light source. Torches typically do not contain magnets. The light in a torch is produced by a bulb or LED, which works based on electrical current, not magnets.

d) None:
The option "None" is incorrect because it does not specify any object. It cannot be considered as an answer since it does not provide any information.

Correct Answer:
Based on the analysis above, the correct answer is option c) Torch as it does not contain a magnet.

Conclusion:
In conclusion, out of the given options, a torch does not contain a magnet.