The sector primarily responsible for infrastructure development in India is:

Correct answer: (a) Public Works

Explanation

Public works are the government's construction and upkeep of physical infrastructure: roads, bridges, public buildings and water works. In India this is done mainly by the Central Public Works Department (CPWD), set up in 1854, and the state Public Works Departments.

Education and health are social services (social infrastructure), and water transport is only one part of transport. So public works is the sector primarily responsible for building infrastructure.