The correct option is A Diu
Explanation: In a major boost for utilisation of renewable energy in the country, Diu has become the first and only Union Territory to be fully solar energy efficient. This achievement by one of the major tourist attractions of the country showcases an effective method of harnessing an important source of renewable energy source. In the last three years, Diu has made expeditious progress in the field of solar power generation as it has become the first UT in the country where more than 100% of the energy requirement is met by solar power.