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Correct Answer : Lumding – Badarpur Railway
Explanation : The “Mountain Railways of India” consists of three rail lines namely: Darjeeling Himalayan Railway, Nilgiri Mountain Railway and Kalka – Shimla Railway. These lines are narrow gauge and are not included in the Project Unigauge. They are included in the UNESCO World Heritage sites.
Correct Answer : Option (D) : All of the above
Correct Answer : Option (A) : turnout
Correct Answer : Option (C) : 30 to 35 cm