- 1984
- 1992
- 1997
- 1999
Answer: 1999
Explanation: Policy Circulars on Railway Heritage Preservations. Indian Railways is the proud owner of four UNESCO accorded World Heritage Sites namely Darjeeling Himalayan Railway (1999), Nilgiri Mountain Railway (2005), Kalka Shimla Railway (2008) and Chhatrapati Shivaji Terminus, Mumbai (2004).
