The correct answer is option 'B', which is "Bhutan is the only country in the world to have negative carbon emissions."

Explanation:

Bhutan is a small landlocked country located in the eastern Himalayas, bordered by India to the south and China to the north. Bhutan is known for its unique development philosophy of Gross National Happiness (GNH) which emphasizes sustainable development, environmental conservation, cultural preservation, and good governance.

Bhutan is the only carbon-negative country in the world, which means that it absorbs more carbon dioxide from the atmosphere than it emits. It is estimated that Bhutan absorbs three times more carbon than it emits, making it a carbon-negative country.

Here are some of the reasons why Bhutan is a carbon-negative country:

1. Forest cover: Bhutan has a forest cover of over 70%, making it one of the most forested countries in the world. The forests in Bhutan act as carbon sinks, absorbing more carbon dioxide from the atmosphere than they emit.

2. Renewable energy: Bhutan relies heavily on hydropower for its energy needs, which is a clean and renewable energy source. Hydropower accounts for more than 90% of Bhutan's total electricity generation.

3. Sustainable agriculture: Bhutan practices sustainable agriculture, which involves using organic farming methods, crop rotation, and intercropping. This helps to reduce the use of synthetic fertilizers and pesticides, which emit greenhouse gases.

4. Government policies: The Bhutanese government has implemented policies and programs to promote environmental conservation and sustainable development. For example, the government has imposed a ban on plastic bags and has encouraged the use of electric vehicles.

In conclusion, Bhutan's unique approach to development, which emphasizes environmental conservation and sustainable development, has made it a carbon-negative country. Bhutan's success in achieving negative carbon emissions is an inspiration to other countries to adopt sustainable policies and practices to reduce their carbon footprint.