The correct answer is C. VIII A.
The inert gases, also known as noble gases, are the chemical elements in group 18 of the periodic table. They are all very stable and do not react with other elements easily. This is because they have a full valence shell of electrons.
The elements in group 18 are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn). Helium is the lightest element in the periodic table and is a gas at room temperature. Neon, argon, krypton, and xenon are also gases at room temperature, but radon is a solid.
The inert gases are used in a variety of applications, including lighting, welding, and cryogenics. They are also used in some medical treatments.
Option A is incorrect because group 1A contains the alkali metals, which are very reactive elements. Option B is incorrect because group 3A contains the alkaline earth metals, which are also very reactive elements. Option D is incorrect because group 4A contains the carbon group elements, which are also very reactive elements.