Taxonomic key is one of the taxonomic tools in the identification and classification of plants and animals. It is used in the preparation of

Options

A. monographs
B. flora
C. both (a) and (b)
D. none of these

Explanation

### Step-by-Step Solution:

1. **Understanding Taxonomic Key**: A taxonomic key is a tool used for identifying organisms based on their characteristics. It provides a systematic approach to classify and identify plants and animals.

2. **Identifying Options**: The question provides four options:
- A) Monographs
- B) Flora
- C) Both A and B
- D) None of these

3. **Analyzing Option A - Monographs**:
- Monographs are detailed written studies of a single taxon. They provide comprehensive information about a particular group of organisms, including their classification, distribution, and characteristics.
- They help in identifying specific species and understanding their taxonomy.

4. **Analyzing Option B - Flora**:
- Flora refers to a comprehensive description of the plant life in a particular region. It includes information about the habitat, climate, seasonal changes, and distribution of plants.
- Flora serves as a reference for identifying plant species and understanding their ecological context.

5. **Combining Insights**:
- Both monographs and flora are essential taxonomic tools. Monographs provide detailed information about specific taxa, while flora gives a broader overview of plant life in a region.
- Therefore, both tools can be used in the identification and classification of plants and animals.

6. **Final Answer**: Based on the analysis, the correct answer is **C) Both A and B**. Both monographs and flora are used in the preparation of taxonomic keys for identification and classification.