The right option is; It is made of two hydrogen atoms and one oxygen atom.
Every water molecule is made of two hydrogen atoms and one oxygen atom.
Water is a clear, tasteless, odorless liquid with the chemical formula H2O. Water molecule is composed of two light hydrogen atoms that are joined to a 16-fold heavier oxygen atom. Water molecule is neutral electrically but polar because of its polar covalent bonds and its bent nature. Water exists in liquid form, in solid form as ice, and in gaseous form as water vapor or steam.