The correct answer is A. 1952.
The Railway Carriage and Wagon Workshop in Yamunanagar was established in 1952. It is one of the largest workshops of its kind in India. The workshop is responsible for the maintenance and repair of railway carriages and wagons. It also manufactures new carriages and wagons. The workshop has a workforce of over 10,000 people.
Option B is incorrect because the workshop was established in 1952, not 1972.
Option C is incorrect because the workshop was established in 1952, not 1962.
Option D is incorrect because the workshop was established in 1952, not 1942.