The correct answer is (d). Dehradun got connected with railway in 1885.
The first railway line in India was opened in 1853 between Bombay and Thane. The railway network in India expanded rapidly in the following decades. In 1885, the railway line from Roorkee to Dehradun was opened. This railway line was a major milestone in the development of Dehradun. It helped to connect Dehradun with other parts of India and made it easier for people to travel to and from the city. The railway line also helped to boost the economy of Dehradun. It made it easier for goods to be transported to and from the city, which helped to attract businesses and industries to Dehradun.
The other options are incorrect. Option (a) is incorrect because the railway line from Roorkee to Dehradun was opened in 1885, not 1910. Option (b) is incorrect because the railway line from Roorkee to Dehradun was opened in 1885, not 1900. Option (c) is incorrect because the railway line from Roorkee to Dehradun was opened in 1885, not 1890.