The correct answer is: 1999.
The State Medicinal Plant Board was set up in Haryana in 1999. The board is responsible for the development and promotion of the medicinal plant sector in the state. It works to improve the cultivation, processing, and marketing of medicinal plants. The board also provides support to farmers and entrepreneurs in the medicinal plant sector.
Option A: 2016 is incorrect because the State Medicinal Plant Board was set up in 1999, not 2016.
Option B: 2002 is incorrect because the State Medicinal Plant Board was set up in 1999, not 2002.
Option C: 2019 is incorrect because the State Medicinal Plant Board was set up in 1999, not 2019.
Option D: 1999 is correct because the State Medicinal Plant Board was set up in 1999.