The question asks to identify the conservation program that completed 50 years around April 2023.
Conservation Program Milestones
We need to check the launch dates of the prominent conservation programs mentioned:
- Project Tiger: Launched on April 1, 1973. This program celebrated its 50th anniversary in April 2023.
- Project Elephant: Launched in August 1992. It is less than 50 years old as of 2023.
- Project Hangul: Initiated around 1970 for the conservation of the Kashmir Stag (Hangul). While it's a long-standing project, its 50th anniversary was in 2020, not 2023.
- Project Snow Leopard: Launched in 2009. It is significantly less than 50 years old.
Identifying the 50-Year Program
Based on the launch dates:
- Project Tiger's 50th anniversary falls precisely in April 2023.
- The other programs do not meet the 50-year criterion in April 2023.
Therefore, Project Tiger is the conservation program that completed 50 years in April 2023.