Question: Pick up the correct statement from the following: Blisters in the finished wrought iron, are caused due to the reaction between oxide of iron and

Pick up the correct statement from the following:
Blisters in the finished wrought iron, are caused due to the reaction between oxide of iron and carbon
The edges of a finished wrought iron, are rough due to red shortage
Pig iron (charcoal) is manufactured from magnetic ore (Fe3O4)
For the manufacture of wrought iron, non-sulphurous fuel is not necessary
All the above.

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