Q. Consider the following statements:Coke is one of the materials of the charge added to blast furnace for the production of steel/iron. Its function is to 1. Act as a reducing agent.2. Remove silica associated with the iron ore.3. Function as fuel to supply heat.4. Act as an oxidizing agent  

1. 1 and 2 are correct
2. 2 and 4 are correct
3. 1 and 3 are correct
4. 3 and 4 are correct