In a doped semiconductor, what is the absence (deficiency) of an electron called?

None of these

Th correct answer is Option 4: none of these. 

In a doped semiconductor, the deficiency of an electron is called a hole.

Option 1: Proton — This is a subatomic particle found in the nucleus of an atom. While it has a positive charge, it is not a charge carrier in a semiconductor.

Option 2: Positron — This is the antimatter counterpart of an electron. It is not found in standard semiconductor physics.

Option 3: Neutron — This is a neutral subatomic particle in the nucleus and plays no role in electrical conduction.