AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
The correct answer is (B): NW-3 — West Coast Canal, Kottapuram to Kollam, approximately 205 km.
The passage clearly states NW No. 3 is the West-Coast Canal (Kottapuram–Kollam, Udyogamandal and Champakkara canals) = 205 km. Option (A) in the question swaps the direction (Kollam to Kottapuram) but the length 205 km is correct; however, option (D) gives 168 km which is wrong. The MCQ option that fully matches the source — correct waterway, correct route description, and correct length (205 km) — corresponds to choice (B) from the given options.
Source: Chapter 7, Waterways section.