Correct Answer: Helium

Solution : The correct option is Helium .

Helium does not belong to the Halogens group. The Halogens group consists of fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). Helium (He) belongs to the noble gases group. Helium is a colourless, odourless, inert, and non-toxic gas. Helium is the second lightest and second most abundant element in the observable universe, after hydrogen. It is also a monoatomic gas and the first element in the group of inert gas.