Super highways are constructed and maintained by?
a. Central public work department
b. National highway authority of India
c. Road transport corporation of India
d. State public work department

Hint: The significant target of these Super Highways is to lessen the time and separation between the uber urban communities of India.

Complete answer:
The Golden Quadrilateral (GQ) is a national highway network associating the greater part of the major mechanical, agrarian and social focuses of India. It frames a quadrilateral associating the four significant metro urban areas of India, viz., Delhi (north), Kolkata (east), Mumbai (west) and Chennai (south). Different urban communities associated by this organization incorporate Ahmedabad, Bengaluru, Balasore, Bhubaneswar, Cuttack, Durgapur, Jaipur, Kanpur, Pune, Kolhapur, Surat, Vijayawada, Ajmer, Vizag, Bodhgaya, Varanasi, Allahabad, Agra, Mathura, Dhanbad, Gandhinagar, Udaipur, and Vadodara. The primary target of these super highways is to lessen the separation and time between the four uber urban communities of India. At 5,846 kilometres (3,633 mi), it is the biggest highway venture in India and the fifth longest in the world. It is the main period of the National Highways Advancement Task (NHDP), and comprises four-and six-path express highways, worked at an expense of ₹600 billion (US$8.4 billion). The undertaking was arranged in 1999, dispatched in 2001, and was finished in 2012.

Hence, the correct answer is option B.

The Golden Quadrilateral venture is overseen by the National Highways Authority of India (NHAI) under the Service of Street, Transport and Highways. By far most of the framework isn't access controlled, despite the fact that wellbeing highlights, for example, guardrails, shoulders, and high-perceivability signs are being used.

Note:
The Mumbai–Pune Freeway, the main controlled-access expressway to be underlying India, is a piece of the GQ Task however not financed by NHAI, and is discrete from the old Mumbai - Pune segment of National Highway 48 (India). Framework Renting and Money related Administrations (IL&FS) has been one of the significant supporters of the infrastructural improvement action in the GQ venture.