Which from following dopants is used in germanium to produce p-type semiconductor?

A p-type semiconductor is created by doping a Group 14 element like germanium with a trivalent impurity from Group 13. These impurities possess three valence electrons, forming three covalent bonds with neighboring atoms and leaving one bond position vacant. This vacancy constitutes a positive hole that acts as a mobile charge carrier, resulting in p-type conductivity.

Among the options:

$A)$ Boron (B) is a Group 13 element and creates holes, yielding a p-type semiconductor.
$B)$ Phosphorus (P) is pentavalent (Group 15) and provides extra electrons, producing n-type conductivity.
$C)$ Arsenic (As) is also pentavalent (Group 15), leading to n-type behavior.
$D)$ Antimony (Sb) is pentavalent (Group 15), again resulting in n-type characteristics.

The only trivalent dopant is boron, making it the correct choice.