helium, neon, and argon are examples of\na metals.\nb metalloids.\nc noble gases.\nd transitional metals.

Brief Explanations:

Helium, neon, and argon are in Group 18 of the periodic table. Elements in this group are known as noble gases. They have full outer - electron shells, making them very stable and unreactive under normal conditions. Metals are good conductors of heat and electricity, metalloids have properties intermediate between metals and non - metals, and transitional metals are in the d - block of the periodic table. These elements do not fit the characteristics of metals, metalloids, or transitional metals.

Answer:

C. noble gases