Which one is/are correct statement:-

Options

A. According to an estimate, almost 40 percent forests have been lost in the tropics compared to only 1 percent in the temperate region
B. At the beginning of nineteenth century, forest covered about 30 percent of the land of India. It shrunk to 19.4 percent
C. National forest policy (1988) of Indian has recommended 33 percent forest cover for the plains & 67 percent for hills.
D. All of the above

Answer

To determine which statements are correct regarding forest loss and conservation, we can analyze each statement step by step.

### Step-by-Step Solution:

1. **Assess the first statement**:
- The statement claims that almost 40% of forests have been lost in the tropics compared to only 1% in the temperate region.
- This is a factual statement based on estimates of deforestation rates in different regions.
- **Conclusion**: This statement is correct.

2. **Evaluate the second statement**:
- This statement indicates that at the beginning of the 19th century, forests covered about 30% of the land in India, and now it has shrunk to 19.4%.
- Historical data supports this claim, showing a significant reduction in forest cover in India over the years.
- **Conclusion**: This statement is also correct.

3. **Examine the third statement**:
- The statement refers to the National Forest Policy (NFP) of 1988, which recommends that forest cover should be 33% for plains and 67% for hills in India.
- This policy is indeed a guideline set by the Indian government to improve forest cover and is widely recognized.
- **Conclusion**: This statement is correct as well.

4. **Summarize the findings**:
- All three statements provided in the question are correct.
- Therefore, the correct answer to the question is that all statements are accurate.

### Final Answer:
All three statements are correct.