Given below are two statements:
Assertion (A): | Magnesium metal is not used for the reduction of alumina in the metallurgy of aluminum |
Reason (R): | Magnesium can reduce alumina. But the process will be uneconomical. |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | (A) is false but (R) is true. |