Which national highway connects Patna to Delhi?
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NH-19 (formerly known as NH-2 or the Grand Trunk Road section) connects Patna in Bihar to Delhi. This national highway is part of the historic Grand Trunk Road (GT Road) route that runs from Amritsar to Kolkata via Delhi, Agra, Varanasi, and Patna. After the renumbering of national highways by the Ministry of Road Transport and Highways, NH-2 was redesignated as NH-19. This highway passes through major cities including Delhi, Agra, Kanpur, Allahabad (Prayagraj), Varanasi, and Patna. NH-27 is a national highway that runs in the east-west direction across India. NH-31 runs through parts of West Bengal, Bihar, and connects to northeastern states. NH-33 passes through Jharkhand and connects Ranchi to Jamshedpur and other parts.