The correct answer is: D. 2017
Road Development Vision, 2020 was approved by the Bihar State Government in 2017. The vision aims to develop a network of roads that will connect all parts of the state and improve connectivity with other states. The vision also aims to improve the quality of roads and make them safer for commuters.
Option A is incorrect because the Road Development Vision, 2020 was not approved in 1985. The Road Development Vision, 1985 was a different plan that was approved in 1985.
Option B is incorrect because the Road Development Vision, 2020 was not approved in 2000. The Road Development Vision, 2000 was a different plan that was approved in 2000.
Option C is incorrect because the Road Development Vision, 2020 was not approved in 2010. The Road Development Vision, 2010 was a different plan that was approved in 2010.