**Core Concept**
Primary Health Care (PHC) is an essential **health care** approach that emphasizes preventive, curative, and rehabilitative services. It is based on **community participation** and aims to provide accessible and affordable health care to all individuals. The **World Health Organization (WHO)** plays a significant role in promoting PHC globally.

**Why the Correct Answer is Right**
Since the options are missing, let's discuss the general concept. PHC typically includes services like **health education**, **nutrition**, **maternal and child health care**, and **immunization**. It also encompasses **disease prevention** and **control**, **diagnosis**, **treatment**, and **rehabilitation**. However, without the specific options, we can't pinpoint the exact correct answer.

**Why Each Wrong Option is Incorrect**
**Option A:** Without the specific option, it's challenging to provide a detailed explanation.
**Option B:** Similarly, this option is unknown.
**Option C:** This option is also missing.
**Option D:** The last option is not provided.

**Clinical Pearl / High-Yield Fact**
A crucial aspect of PHC is **community involvement**, which helps in identifying and addressing local health needs. **Intersectoral collaboration** is also vital for the success of PHC, as it requires cooperation between different sectors, such as health, education, and social services.

**Correct Answer:** D. Secondary and Tertiary Care.