Which of the following is not a device? Tick (✔) the right option.

The option that is not a device is: a) Virus.

Explanation: A device typically refers to a physical tool or instrument designed for a specific purpose. A pen, hammer, and comb are all tangible objects used for writing, construction, and grooming, respectively. In contrast, a virus is a microorganism that causes disease and does not fit the definition of a device in this context.

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