Assertion (A): Sodium and potassium are reactive elements.

Reason (R): Sodium and potassium occur in free states

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.

Assertion (A): Minerals are the substances from which metals can be extracted profitably.

Reason (R): Ores are those minerals from which metals are extracted commercially and profitably.

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.

Assertion (A): Metallurgy deals with the production and purification of metals.

Reason (R): Reduction is one of the methods of extraction of metals.

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.

Assertion (A): The concentration of aluminium is not done by leaching process.

Reason (R): In leaching process, the ore is dissolved in an acid or alkali

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.