The correct answer is: None of the above.
A computer is a machine that can be programmed to carry out sequences of arithmetic or logical operations automatically. Modern computers can perform generic sets of operations known as programs. These programs enable computers to perform a wide range of tasks.
A light bulb is a device that emits light when an electric current is passed through it. It is a simple device that consists of a glass bulb, a filament, and a base. The filament is a thin wire that is heated by the electric current. The heat causes the filament to glow, which produces light.
A pen is a writing instrument that is used to apply ink to a surface. Pens come in a variety of shapes and sizes, and they can be used for a variety of purposes. Some pens are used for writing, while others are used for drawing or painting.
A switch is a device that is used to turn something on or off. Switches can be used to control a variety of things, including lights, appliances, and machines.
A pad is a flat surface that is used for writing, drawing, or other activities. Pads come in a variety of sizes and shapes, and they can be made from a variety of materials.
None of these objects have the ability to think or reason, which are the defining characteristics of sentience.