Vessels are multicellular with wide lumen. They are made up of vessel  elements lying one above the other. The wall of vessels is hard but not thick having wide lumen. These have a wide lumen for conduction of minerals and water whereas tracheids are unicellular with narrow lumen. 

Thus, the correct answer is 'Vessels are multicellular with wide lumen'.

Tracheids and Vessels in Plants

Introduction:
Tracheids and vessels are two types of water-conducting cells found in the xylem tissue of plants. They play a crucial role in transporting water and minerals from the roots to other parts of the plant.

Tracheids:
- Tracheids are elongated, tubular cells that are found in most vascular plants, including gymnosperms and angiosperms.
- They are unicellular, meaning each tracheid is an individual cell.
- Tracheids have tapering ends and are interconnected through pits, which allow water to flow from one tracheid to another.
- The lumen, or the central cavity of tracheids, is relatively narrow compared to vessels.
- Tracheids are responsible for both water transport and mechanical support in plants.

Vessels:
- Vessels, also known as vessel elements, are another type of water-conducting cells found in angiosperms.
- Vessels are multicellular structures composed of several vessel elements stacked end to end.
- Each vessel element has perforations in its cell walls, forming a continuous tube-like structure.
- These perforations, called vessel perforations, allow water to flow freely between vessel elements, facilitating efficient water transport.
- Vessels have a wider lumen compared to tracheids, allowing for greater water flow.
- In addition to water transport, vessels also provide mechanical support to plants.

Correct Answer:
- The correct answer to the given question is option 'B': "Vessels are multicellular with wide lumen."
- This statement accurately describes the characteristics of vessels in plants.
- Vessels are multicellular structures made up of several vessel elements stacked together.
- They have a wider lumen, or central cavity, compared to tracheids, allowing for more efficient water transport.

Conclusion:
- Tracheids and vessels are both important components of the xylem tissue in plants, facilitating the transport of water and minerals.
- Tracheids are unicellular with a narrow lumen, while vessels are multicellular with a wide lumen.
- Understanding the characteristics and functions of tracheids and vessels helps in comprehending the complex process of water movement in plants.