Choose the correct combination.

1. only A1 and B2 are correct.
2. only B2 and C3 are correct.
3. only A1 and D4 are correct.
4. only B2 and D4 are correct.

Silver and gold are malleable and …………… .

1. heavy metals
2. conductors of electricity
3. found in sedimentary rocks
4. ductile

Two statements are given in the question below as Assertion (A) and Reason (R). Read the statement and choose the appropriate option:

Assertion (A): Minerals such as coal and natural gas are called energy minerals.

Reason (R): They provide heat and electric energy.

1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true and (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. (A) is false and (R) is true.

Two statements are given in the question below as Assertion (A) and Reason (R). Read the statement and choose the appropriate option:

Assertion (A): Minerals should be used judiciously.

Reason (R): Minerals are important for our daily needs.

1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true and (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. (A) is false and (R) is true.