Ashwini Vaishnav inaugurated India's first 3D printed post office building in Bengaluru. It has been constructed by _____ company along with _____.

### Concept & Facts 3D printing in construction (also known as additive manufacturing) is an emerging technology used to build infrastructure faster and more cost-effectively by extruding concrete layer by layer. ### Step-by-Step Solution * India's first 3D-printed post office was inaugurated in Cambridge Layout, Bengaluru. * The construction was carried out by Larsen & Toubro (L&T), a major multinational conglomerate known for pioneering 3D construction technology in India. * They received crucial technological guidance and structural validation from the Indian Institute of Technology (IIT) Madras. ### Exam Strategy & Shortcut IIT Madras has an established startup ecosystem and research department specifically known for pioneering 3D printed concrete in India (e.g., Tvasta). Pairing IIT Madras with L&T (India's largest construction firm) is a logical deduction. ### Common Pitfall Assuming Tata built it due to their massive brand presence in national infrastructure. While Tata is huge, L&T holds the specific milestone for this 3D printed post office. ### Final Answer Therefore, the correct answer is **L & T and IIT Madras**.