Answer:
Option A,D
Explanation:
The important ore of tin is cassiterite (SnO2 ) Tin is extracted from cassiterite ore by carbon reduction method in a blast furnace.
SnO2 + 2C —>Sn + 2CO
The product often contains traces of iron which is removed by blowing air through the melt to oxidise to FeO which then floats to the surface
$2Fe+O_{2} \rightarrow 2FeO$
