**Question:** Under the Primary health care, which of the following staff is present at the subcentre level?

**Core Concept:** Primary Health Care (PHC) is a system of coordinated health services that focus on the overall health needs of the population, with the aim of achieving the highest level of health possible for all individuals and communities. Subcentre is a level within the PHC system, responsible for delivering basic health services to the community.

**Why the Correct Answer is Right:** The correct answer is **D**: Community Health Worker (CHW) is the staff present at the subcentre level in the context of Primary Health Care. CHWs are trained individuals who provide preventive, promotive, and curative health services to the community, focusing on the health needs of the population.

**Why Each Wrong Option is Incorrect:**

A. **Physician:** A physician is a specialist doctor who focuses on diagnosing and treating diseases and injuries. They are not typically found at the subcentre level, as their expertise is not aligned with the preventive and promotive services provided by CHWs.

B. **Nurse:** Nurses are also healthcare professionals, but their main role is to provide patient care, educate, and promote health, rather than conducting community health work. They are usually found in hospitals or clinics but not specifically at the subcentre level.

C. **Medical Officer:** A Medical Officer (MO) is a doctor who provides general medical care and supervises the health services at the primary care level. However, their expertise focuses more on clinical care rather than community health work, which is the primary responsibility of CHWs at the subcentre level.

E. **Health Worker:** While a Health Worker is a healthcare professional, they are typically involved in basic primary care tasks, such as vaccinations, maternal and child health care, and basic diagnostics. They do not focus on community health work, which is the primary responsibility of CHWs at the subcentre level.

**Core Concept:** In the context of Primary Health Care and community health services, CHWs are the appropriate staff for the subcentre level due to their focus on preventive, promotive, and curative services for the community.

**Why Each Wrong Option is Incorrect:**

A. **Physician:** Physicians are specialists who focus on diagnosing and treating diseases and injuries; they do not typically work at the community level.

B. **Nurse:** Nurses primarily work in hospitals and clinics, focusing on patient care rather than community health work.

C. **Medical Officer:** MOs primarily provide general medical care and supervise the health services at the primary care level, but they do not focus on community health work, which is the primary responsibility of CHWs at the subcentre level.

D. **Health Worker:** Health workers are involved in basic primary care tasks, such as vaccinations, maternal and child health care, and basic diagnostics. However, they do not focus on community health work, which is the primary responsibility of CHWs at the subcentre level.

**Correct Answer Explanation:**

The correct answer, D, is