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The correct answer is option (b): 2. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
This question was asked in UPSC CSE Prelims 1995, GS Paper 1, as Question 86. It falls under Geography > Transport & Infrastructure Geography.
This question is rated "easy". It tests basic recall and most well-prepared aspirants should answer it correctly.
UPSC has asked 33 questions from Transport & Infrastructure Geography (under Geography) across multiple years. Visit the topic page to see the full list and year-wise trends.