Xylem vessels, which help in water conduction, are commonly present in:

Correct answer: (b) Angiosperms

Explanation

Vessels are long tubes formed by cells joined end to end with their end walls dissolved, so water flows through them quickly. They are a characteristic of angiosperms (flowering plants).

Gymnosperms and pteridophytes usually conduct water through tracheids only, which are narrower and less efficient. Vessels occur in only a few of them, such as *Gnetum* among the gymnosperms and *Selaginella* among the pteridophytes.