Statements B and D are correct with regard to water transportation in India. The headquarters of Central Inland Water Transport Corporation are located in Kolkata (and not at Delhi). National Inland Navigation Institute is located in Patna (and not at Kolkata). So, statements A and C are incorrect. The National Waterway 1 or NW-1 or Ganga-Bhagirathi-Hooghly river system is located in India and runs from Haldia to Allahabad across the Ganges, Bhagirathi and Hooghly river systems. It is 1,620 km-long, making it the longest waterway in India.