Retort cells occur in

Options

A. Funaria
B. Polygonatum
C. Porella
D. Sphagnum.

Answer

**Step-by-Step Solution:**

1. **Understanding Retort Cells**: Retort cells are specialized cells that help in the retention of water. They are elongated and have a unique shape that resembles a retort, which is a type of laboratory flask.

2. **Identifying the Structure**: These cells are found in the outer cortex of certain plants. They are characterized by their long, curved necks and openings at the distal end, which allows for efficient water retention.

3. **Analyzing the Options**:
- **Funerea**: This is not known for having retort cells.
- **Polygonatum**: This plant does not feature retort cells.
- **Porella**: While it is a type of liverwort, it does not have retort cells.
- **Sphagnum**: This is a type of moss known for its water-retaining capabilities and is specifically recognized for having retort cells.

4. **Conclusion**: Based on the characteristics of retort cells and the analysis of the options provided, the correct answer is **Sphagnum**.

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