Differentiate between sub health post and health post​

While many health institutions across the country are struggling to provide basic services to patients, a sub-health post in the district has managed to provide round-the-clock ambulance and maternity services to local people. The sub-health post has also been providing counseling services to youths on a weekly basis.

HealthPost provides powerful web-based appointment scheduling software for the health care industry and also operates a comprehensive health care services marketplace at HealthPost.com that aggregates appointment availability from providers of all types and offers 24x7 real-time booking capabilities.

your answer will be c. sorry if im wrong: )