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Building Materials - Section 6 :: Discussion
| 32. | Pick up the correct statement from the following: | |
| A. | Blisters in the finished wrought iron, are caused due to the reaction between oxide of iron and carbon | |
| B. | The edges of a finished wrought iron, are rough due to red shortage | |
| C. | Pig iron (charcoal) is manufactured from magnetic ore (Fe3O4) | |
| D. | All the above. | |
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