which of the following pointing device is cheaper while comparing the digitizer

The cost of a pointing device, including a digitizer, can vary depending on several factors such as brand, model, features, and specifications. It's difficult to determine which one is cheaper without more information about the specific devices you are comparing.

However, in general, touchpads, trackballs, and regular mice tend to be cheaper than digitizers. On the other hand, more advanced and feature-rich digitizers, such as graphics tablets and stylus pens, can be more expensive.

It's worth noting that while a basic mouse or touchpad may be cheaper upfront, a high-quality digitizer can offer more precise and efficient input for tasks such as graphic design, animation, or digital art.