Assertion and Reason 3

11) Assertion (A): The bulb filament is made of silver.

Reason (R): Silver does not melt.

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.
5. Both A and R are false.

12) Assertion (A): Telephone wires sag more in summers than winters.

Reason (R): The wires expand due to heat.

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.
5. Both A and R are false.

13) Assertion (A): The handles of pressure cooker are made of ebonite.

Reason (R): Ebonite is a hard metal which does not break easily.

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.
5. Both A and R are false.

14) Assertion (A): The earthworms reduce the fertility of the soil.

Reason (R): They make the soil soft and porous.

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.
5. Both A and R are false.

15) Assertion (A): A fish has a streamlined body.

Reason (R): The streamlined body helps fishes move faster in the water.

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.
5. Both A and R are false.