Assertion (A): Collenchyma is composed of long and narrow cells. These cells have very thick walls due to the deposition of lignin.

Reason (R): Collenchyma stores food and provides temporary support to the parts of a plant.

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): Tracheids are made up of elongated dead cells with large cavities without any contents.

Reason (R) : Tracheids provide mechanical support by developing various types of thickenings in their walls.

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): Cardiac muscles are striated, uninucleated and branched. Cells are relatively short and located in the muscles of the heart.

Reason (R): Cardiac muscles can contract without outside stimulation and do not get tired 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.

Assertion (A): Xylem and phloem are the two types of vascular tissues which help in the transportation of materials to the various parts of the plant.

Reason (R): Xylem transports water and minerals from the roots to the leaves whereas phloem transports the prepared food material from the leaves to various parts of the plant.

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.