Which of the following group of plants lacks archegonium?(a) Gymnosperms(b) Angiosperms(c) Bryophytes(d) Pteridophytes

The group of plants that lacks archegonium is (b) Angiosperms.

Here's a step-by-step explanation:

1. Archegonium is a specialized organ that produces eggs in non-flowering plants. It is present in Bryophytes, Pteridophytes, and Gymnosperms.

2. Bryophytes are non-vascular plants that reproduce through spores. They have archegonia that produce eggs for fertilization.

3. Pteridophytes are vascular plants that also reproduce through spores. They too have archegonia.

4. Gymnosperms are vascular plants that reproduce through seeds, not spores. However, they still have archegonia.

5. Angiosperms, or flowering plants, are also vascular and reproduce through seeds. However, they do not have archegonia. Instead, they have a structure called an ovule within the flower where fertilization occurs.