Which one of the following is not a metalloid
Gallium
The explanation for the correct option:
C) Gallium is a metal
The explanation for the incorrect option:
Metalloids show the property in between metals and non-metals
Examples include: Boron, silicon, germanium, arsenic, antimony, and tellurium
(A), (B), and (D) are metalloids
Thus, option (C) i.e gallium is a metal, not a metalloid