Among statements I-IV, the correct ones are:
(I) Decomposition of hydrogen peroxide gives dioxygen
(II) Like hydrogen peroxide, compounds, such as KClO3, Pb(NO3)2 and NaNO3 when heated liberate dioxygen.
(III) 2-Ethylanthraquinone is useful for the industrial preparation of hydrogen peroxide.
(IV) Hydrogen peroxide is used for the manufacture of sodium perborate