Concept:Project Tiger is a government initiative started in 1973 to protect tigers and their habitats in India.
Explanation:The Indian government launched Project Tiger on 1 April 1973.
It is a centrally sponsored scheme under the Ministry of Environment, Forests and Climate Change.
The project was started during the tenure of Prime Minister Indira Gandhi.
Later, in 2006, it was converted into a statutory authority called the National Tiger Conservation Authority (NTCA) through the Wildlife (Protection) Amendment Act.
NTCA manages Tiger Reserves and conducts a national tiger assessment every four years.
Thus, the correct year for the start of Project Tiger is 1973.
Answer:B. 1973