The _________ was inaugurated to conduct comprehensive health checkups for the entire population of Haryana at least once every two years.

Correct option is D

The correct answer is Nirogi Haryana Scheme.
The Nirogi Haryana Scheme was inaugurated by the Government of Haryana to conduct comprehensive health checkups for the entire population of Haryana at least once every two years. 
The scheme, also known as "New Initiative for Robust and Good Health in Haryana" (NIROGI Haryana), was launched to ensure that every citizen in the state receives regular health checks. It aims to provide free treatment to Antyodaya families in Haryana, as well as to provide health check-ups at least once every two years.