Which statement is true

Options

A. Tautonyms are not allowed in plants
B. Tautonyms are not allowed in animals
C. Tautonyms normally allowed in animals and some time allowed in plants
D. Tautonyms allowed only in bacteria

Answer

### Step-by-Step Solution:

1. **Understanding Tautonyms**:
- Tautonyms are scientific names where the genus and species names are identical. For example, the red fox is scientifically named *Vulpes vulpes*.

2. **Identifying the Relevant Codes**:
- The International Code for Zoological Nomenclature (ICZN) governs the naming of animals and allows the use of tautonyms.
- The International Code for Botanical Nomenclature (ICBN) governs the naming of plants and does not allow tautonyms.

3. **Evaluating the Options**:
- **Option A**: "Tautonyms are not allowed in plants."
- This is true because ICBN does not permit tautonyms.
- **Option B**: "Tautonyms are not allowed in animals."
- This is false as tautonyms are allowed in animals under ICZN.
- **Option C**: "Tautonyms are normally allowed in animals, sometimes allowed in plants."
- This is false since tautonyms are not allowed in plants at all.
- **Option D**: "Tautonyms are allowed only in bacteria."
- This is misleading because tautonyms are not restricted to bacteria; they are allowed in all animals.

4. **Conclusion**:
- The correct answer is **Option A**: "Tautonyms are not allowed in plants."