The correct answer is: A. NH 8
NH 8 is the busiest national highway passing through Gujarat. It is a part of the Golden Quadrilateral, a network of national highways that connects the four major metropolitan cities of India: Delhi, Mumbai, Chennai, and Kolkata. NH 8 passes through the cities of Ahmedabad, Vadodara, and Surat. It is a four-lane highway with a speed limit of 100 km/h.
NH 47 is a national highway that connects the cities of Chennai and Kanyakumari. It passes through the states of Tamil Nadu, Kerala, and Karnataka. NH 48 is a national highway that connects the cities of Delhi and Mumbai. It passes through the states of Haryana, Rajasthan, Gujarat, Madhya Pradesh, and Maharashtra. NH 51 is a national highway that connects the cities of Chennai and Kolkata. It passes through the states of Tamil Nadu, Andhra Pradesh, Odisha, and West Bengal.
NH 8 is the busiest national highway passing through Gujarat because it is a part of the Golden Quadrilateral. The Golden Quadrilateral is a network of national highways that connects the four major metropolitan cities of India: Delhi, Mumbai, Chennai, and Kolkata. NH 8 passes through the cities of Ahmedabad, Vadodara, and Surat. It is a four-lane highway with a speed limit of 100 km/h.