During smelting process, the combination of fuel in the furnace A Forms carbon dioxide B Carbon dioxide with carbon forms carbon mono-oxide C Carbon mono-oxide reacts with Fe<sub>2</sub>O<sub>3</sub> to form iron and liberates CO<sub>2</sub> D All the above During smelting process, the combination of fuel in the furnace Correct Answer All the above Bissoy MCQ Team Civil Engineering Building Materials