Correct Answer: Both assertion and reason are correct, and the reason is the correct explanation of the assertion.

Solution : The correct answer is (a) Both assertion and reason are correct, and the reason is the correct explanation of the assertion.

The assertion states that the private sector plays a significant role in healthcare service delivery and infrastructure development, which is correct. In many healthcare systems around the world, the private sector, including private hospitals, clinics, and healthcare providers, plays a crucial role in delivering healthcare services. They contribute to the overall healthcare infrastructure by establishing and maintaining healthcare facilities, investing in medical technology and equipment, and employing healthcare professionals. The private sector's involvement helps expand the availability of healthcare services and infrastructure.

The reason provided states that private healthcare providers contribute to improving accessibility and efficiency in healthcare delivery, and this is the correct explanation of the assertion. Private healthcare providers often bring innovation, competition, and efficiency to healthcare delivery. They can offer a wider range of services, flexible appointment schedules, and shorter waiting times compared to public healthcare systems. Additionally, private sector involvement can improve accessibility to healthcare services, especially in areas with limited public healthcare facilities or in regions with a higher demand for specialized services.

Therefore, both the assertion and reason are correct, and the reason serves as the correct explanation for why the private sector plays a significant role in healthcare service delivery and infrastructure development.