According to Eichler cryptogamia includes :-

Options

A. Gymnosperm and Angiosperm
B. Thallophyta and Gymnosperm
C. Thallophyta, Bryophyta and Pteridophyta
D. Only angiosperm

Answer

**Step-by-Step Solution:**

1. **Understanding the Classification of Plants:**
- The plant kingdom is divided into two main sub-kingdoms based on the presence or absence of flowers and seeds: Cryptogamia and Phanerogamia.
- Cryptogamia refers to plants that do not produce flowers or seeds and reproduce via spores.

2. **Identifying the Divisions of Cryptogamia:**
- According to Eichler, Cryptogamia is further divided into three main divisions:
- Thalophyta: Simple plants like algae that do not have true roots, stems, or leaves.
- Bryophyta: Non-vascular plants like mosses and liverworts that require water for reproduction.
- Pteridophyta: Vascular plants like ferns that reproduce via spores.

3. **Analyzing the Options Given:**
- Option 1: Gymnosperm and Angiosperm - This is incorrect as these belong to Phanerogamia.
- Option 2: Thalophyta and Gymnosperm - This is also incorrect since Gymnosperms are not part of Cryptogamia.
- Option 3: Thalophyta, Bryophyta, and Pteridophyta - This is correct as all three are divisions of Cryptogamia.
- Option 4: Only Angiosperm - This is incorrect as Angiosperms are part of Phanerogamia.

4. **Conclusion:**
- The correct answer according to Eichler's classification of Cryptogamia is **Option 3: Thalophyta, Bryophyta, and Pteridophyta**.