Step 1: Concept
Plant reproductive structures
Step 2: Meaning
Understanding the structure of the embryo sac in higher plants, specifically focusing on the egg apparatus.
Step 3: Analysis
The question is testing knowledge about the types of female gametophytes found in angiosperms. The mature embryo sac has a specific structure that includes eight cells in various developmental stages. Among these, one cell is the egg cell.
Step 4: Conclusion
Among the given options, only B) Fritillaria type correctly describes the arrangement of the egg apparatus in the mature embryo sac, where there is a single egg cell surrounded by other cells forming the embryo sac.
Final Answer: (B)