In which book, Linnaeus proposed the principles of nomenclature :–

Options

A. Species plantarum
B. Systema Naturae
C. Flora lapponica
D. Philosophia botanica

Answer

To answer the question regarding the book in which Linnaeus proposed the principles of nomenclature, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: We need to identify the book where Linnaeus introduced the principles of nomenclature, specifically the binomial system of nomenclature.

2. **Identifying Key Terms**: The key terms here are "principles of nomenclature" and "Linnaeus". This indicates that we are looking for a significant work by Linnaeus related to naming organisms.

3. **Reviewing Linnaeus's Works**: Linnaeus wrote several important books:
- **Species Plantarum** (1753): This book classified plant species known at that time.
- **Systema Naturae**: This work organized living organisms into a hierarchical system.
- **Flora Leponica**: A book focusing on the plants of Lapland.
- **Philosophia Botanica** (1751): This is the book where Linnaeus proposed the binomial system of nomenclature.

4. **Identifying the Correct Book**: Among the options provided, **Philosophia Botanica** is recognized as the first text to outline the binomial nomenclature system. This book laid the foundation for the modern naming of species.

5. **Conclusion**: Therefore, the correct answer to the question is **Philosophia Botanica**.

### Final Answer:
The book in which Linnaeus proposed the principles of nomenclature is **Philosophia Botanica**.

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