Putrefaction is

Options

A. anaerobic breakdown of carbohydrates
B. anaerobic breakdown of proteins with foul odour chiefly sulphur compounds
C. aerobic breakdown of proteins with foul odour chiefly sulphur compounds
D. anaerobic breakdown of fats.

Answer

**Step-by-Step Solution:**

1. **Understanding Putrefaction**:
- Putrefaction is a process that involves the breakdown of organic matter, primarily proteins, by microorganisms in the absence of oxygen.

2. **Anaerobic Conditions**:
- The term "anaerobic" refers to conditions where oxygen is not present. In putrefaction, the breakdown of proteins occurs under these anaerobic conditions.

3. **Breakdown of Proteins**:
- During putrefaction, proteins are decomposed by bacteria and other microorganisms. This process leads to the release of various compounds, including sulfur compounds.

4. **Odor Associated with Putrefaction**:
- The breakdown of proteins during putrefaction produces foul-smelling compounds, often described as having a sulfur-like odor. This is characteristic of the decomposition process.

5. **Identifying the Correct Option**:
- The question provides four options regarding the nature of putrefaction. The correct option is:
- **Anaerobic breakdown of protein with foul odor chiefly sulfur compounds** (which is the second option).

6. **Eliminating Incorrect Options**:
- The first option refers to carbohydrates, which are not primarily involved in putrefaction.
- The third option mentions aerobic conditions, which contradicts the definition of putrefaction.
- The fourth option discusses the breakdown of fats, which is not the main focus of putrefaction.

7. **Conclusion**:
- Therefore, putrefaction is specifically the anaerobic breakdown of proteins, leading to the release of foul-smelling sulfur compounds.