Which of the following statements is correct ?

Options

A. There are working 'EcoSan' toilets in many areas of Kerala and Sri Lanka.
B. Municipal solid wastes are wastes from homes, offices, stores, schools, hospitals, etc., that are collected and disposed by the municipality.
C. In a sanitary landfill, wastes are dumped in a depression or trench after compaction and covered with dirt everyday.
D. All of these

Answer

To determine which of the statements is correct, we will analyze each option provided in the question step by step.

### Step 1: Analyze Option 1
The first option states that "there are working eco-scent toilets in many areas of Kerala and Sri Lanka."
- **Explanation**: Eco-scent toilets are designed to promote sanitation and hygiene in areas lacking proper sewage systems. Both Kerala and Sri Lanka have implemented such toilets to improve public health and environmental conditions.
- **Conclusion**: This statement is **true**.

### Step 2: Analyze Option 2
The second option claims that "municipal solid waste are waste from homes, offices, stores, schools, hospitals, etc., that are collected and disposed of by the municipality."
- **Explanation**: Municipal solid waste includes various types of waste generated from residential and commercial sources. Municipalities are responsible for the collection and disposal of this waste to maintain cleanliness and public health.
- **Conclusion**: This statement is also **true**.

### Step 3: Analyze Option 3
The third option states that "in a sanitary landfill, wastes are dumped in a depression or trench, after compaction they are covered with dirt every day."
- **Explanation**: Sanitary landfills are designed to safely contain waste. Waste is indeed placed in a trench or depression, compacted to reduce volume, and then covered with soil to minimize odors and prevent pests.
- **Conclusion**: This statement is **true**.

### Step 4: Analyze Option 4
The fourth option states that "all of these."
- **Explanation**: Since all the previous statements (1, 2, and 3) have been verified as true, this option is also correct.
- **Conclusion**: Therefore, the correct answer is **Option 4: All of these**.

### Final Answer
The correct answer is **Option 4: All of these**.

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