Tautonyms are valid names according to :–

Options

A. ICBN
B. Species plantarum
C. Genera plantarum
D. ICZN

Answer

### Step-by-Step Solution:

1. **Understanding Tautonyms**:
- Tautonyms are scientific names where the generic name and the specific epithet are the same. For example, "Gorilla gorilla" is a tautonym.

2. **Naming Conventions**:
- In scientific nomenclature, the generic name is written first and capitalized, followed by the specific epithet which is written in lowercase. Both names are italicized or underlined when handwritten.

3. **ICBN vs. ICZN**:
- The International Code of Botanical Nomenclature (ICBN) does not accept tautonyms for plants. Therefore, tautonyms are not valid names in botanical nomenclature.
- The International Code of Zoological Nomenclature (ICZN), however, does accept tautonyms for animals.

4. **Historical Context**:
- The works of Carl Linnaeus, specifically "Species Plantarum" and "Genera Plantarum", do not address tautonyms as valid names.

5. **Conclusion**:
- Since tautonyms are accepted in zoological nomenclature but not in botanical nomenclature, the correct answer to the question is that tautonyms are valid names according to the ICZN.

### Final Answer:
Tautonyms are valid names according to the International Code of Zoological Nomenclature (ICZN).

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