The correct option is D He
He is a n inert or noble gas.Noble/Inert gases are any of the seven chemical elements that make up Group 18 (VIIIa) of the periodic table. The elements are helium(He), neon (Ne), argon(Ar), krypton (Kr), xenon(Xe), radon (Rn), and element 118 ununoctium (Uuo). The noble gases are colourless, odourless, tasteless, nonflammable gases.