National Waterway No. 3 opens up in _____.

The correct answer is Option (4) → Arabian Sea

National Waterway No. 3 runs along the west coast of India, from Kottapuram to Kollam. The sea on this coast is the Arabian Sea.

Note: The picture in this question is Fig. 7.7 (National Waterway No. 3) of the chapter ‘Transport and Communication’ (India: People and Economy). In the book, the figure also carries the label ‘ARABIAN SEA’ along the coast.