**Core Concept**
The question pertains to the disposal of human excreta and waste, which is a critical aspect of public health and sanitation. Proper disposal of night soil and refuse is essential to prevent the spread of diseases and maintain a clean environment.

**Why the Correct Answer is Right**
Composting is the most suitable method for disposing of night soil and refuse as it involves the decomposition of organic matter by microorganisms, resulting in a humus-like substance that can be used as fertilizer. This process breaks down pathogens, reducing the risk of disease transmission. Composting also helps to conserve water, reduces waste, and creates a nutrient-rich soil amendment. The process involves maintaining aeration, moisture, and temperature conditions that favor the growth of beneficial microorganisms.

**Why Each Wrong Option is Incorrect**
**Option A:** Chemical sterilization is not a suitable method for disposing of night soil and refuse as it may not effectively kill all pathogens, and the chemicals used can contaminate soil and water. Additionally, chemical sterilization may not be economically viable for large-scale waste management.

**Option B:** Burning is not an acceptable method for disposing of night soil and refuse as it can release toxic fumes, including dioxins and particulate matter, which can harm the environment and human health. Burning also does not address the issue of pathogens and can create a fire hazard.

**Clinical Pearl / High-Yield Fact**
Composting is an environmentally friendly and cost-effective method for managing organic waste, including night soil and refuse. It is essential to implement proper composting practices to ensure the safe disposal of waste and the production of a valuable soil amendment.

**Correct Answer Line**
✓ Correct Answer: C. Composting