Which of the following statements is/are true?
I. The hydrocarbon methane (CH4) will dissolve completely in acetone (CH3COCH3).
II. Ammonia (NH3) will form a heterogeneous mixture with carbon tetrachloride (CCl4).
III. Pentane (C5H12) will form a homogeneous mixture with carbon tetrabromide (CBr4).
IV. Methanethiol (CH3SH) is miscible in fluoromethane (CH3F).