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GK MCQs Section
Q. Which is the longest highway in Bihar?
Answer: Old NH 57
Notes: Old NH 57 is the longest highway in Bihar. It is now a part of NH 27. Former NH 57 linked Muzaffarpur to Purnea and It was 310 Km long. It became a part of NH 27 in 2010.

This question is part of Bihar General Studies MCQ Series Course on GKToday Android app.