Which of the following give comprehensive account of complete compilation of available information of any family or genus at a given time?

Options

A. Manuals
B. Monographs
C. Publications
D. All of these

Answer

To determine which option provides a comprehensive account of the complete compilation of available information on any family or genus at a given time, we can analyze the given options step by step.

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for a source that provides a comprehensive account of all available information regarding a family or genus. This implies that we need to look for a source that covers various aspects of the taxonomic group.

2. **Evaluating the Options**:
- **Manuals**: These are useful for identifying species and providing names but do not offer comprehensive information about a family or genus. They focus more on identification rather than a detailed study.
- **Monographs**: A monograph is a detailed written study that covers all aspects of a particular taxon, including morphology, phenology, ethnobotany, distribution, and more. This makes it a comprehensive source of information about a family or genus.
- **Publications**: While publications can contain various types of information, they are not specifically focused on providing a comprehensive account of a taxonomic group. They can cover a wide range of topics and are not limited to systematic studies.

3. **Conclusion**: Based on the analysis, the option that provides a comprehensive account of the complete compilation of available information about any family or genus is the **monograph**.

### Final Answer:
The correct answer is **Monograph**.