What major infrastructure project was significantly expanded during Manmohan Singh's prime ministership, often referred to as 'Golden Quadrilateral'?

Quiz Options

• Mumbai-Ahmedabad High-Speed Rail
• Delhi-Mumbai Industrial Corridor
• National Highways Development Project (NHDP)
• Samruddhi Mahamarg

Explanation

The National Highways Development Project, which included the Golden Quadrilateral initiative connecting major metropolitan cities, saw substantial progress during Manmohan Singh's government.