In angiosperms, xylem is made up of:

Correct answer: (d) Tracheids, vessels and fibres

Explanation

Xylem is a complex tissue. In angiosperms it is made of four kinds of cells:

• tracheids and vessels, which carry water and minerals;
• xylem fibres, which give support;
• xylem parenchyma, the only living part, which stores food.

Vessels are the main feature of angiosperm xylem; gymnosperms usually have tracheids but no vessels. Sieve elements belong to the phloem, not the xylem.