The correct options are
B Arunachal Pradesh
C Jammu and Kashmir
D Himachal Pradesh
Railway networks in India is relatively less dense in the hill states like Himachal Pradesh and Uttarakhand, as well as the Union Territory of Jammu and Kashmir. Central parts of India, the north eastern states like Arunachal Pradesh, Assam, Manipur, and Meghalaya as well as the north western state of Rajasthan also have a fairly low density of railways.