इलाहाबाद से नैनी के बीच उड़ान के साथ भारत में व्यावसायिक वायु परिवहन का विकास किस वर्ष प्रारम्भ हुआ?

Which mode of transport is most suitable for carrying bulky and heavy goods over very long distances, particularly in international trade, at the lowest cost?

National Waterway-1 of India covers which of the following stretches?

The North–South corridor, which is a part of the National Highway network, links which two locations in India?