Okay, let's tackle this question. The user is asking about the WHO definition of health and which option is excluded. First, I need to recall the WHO definition. The World Health Organization defines health as a state of complete physical, mental, and social well-being, not just the absence of disease or infirmity. So the key components are physical, mental, social.

The question is asking which option is NOT included. The options aren't provided, but common distractors might include things like spiritual health, environmental factors, or economic aspects. Wait, the original WHO definition doesn't mention spiritual or environmental health. Let me check again. The current definition from 1948 does include physical, mental, and social. So any options that include spiritual, environmental, or other aspects would be incorrect.

Now, if the options are A to D, and the correct answer is one of them, I need to structure the explanation. The core concept is the WHO's holistic view of health. The correct answer is the one that introduces an element not part of the original definition. The wrong options might include elements that are sometimes added in newer interpretations but weren't in the original 1948 definition.

For example, if an option mentions "spiritual well-being," that's not part of the WHO definition. Similarly, options about absence of disease are part of the definition, so those would be correct. The clinical pearl here is to remember the three components: physical, mental, social. Any other components in the options would be incorrect.

**Core Concept**
The World Health Organization (WHO) defines health as "a state of complete physical, mental, and social well-being and not merely the absence of disease or infirmity." This holistic definition emphasizes **physical**, **mental**, and **social** dimensions, excluding other domains like spiritual or environmental health.

**Why the Correct Answer is Right**
The WHO definition intentionally excludes **spiritual health**, **economic status**, or **environmental factors** as explicit components. It focuses solely on the individual’s physical, mental, and social well-being, even though these domains can interact with external factors. This narrow focus is a common exam trap, as newer interpretations sometimes conflate it with broader concepts.

**Why Each Wrong Option is Incorrect**
**Option A:** If it states "absence of disease," this is part of the WHO definition’s negation clause.
**Option B:** If it includes "mental well-being," this is explicitly part of the definition.
**Option C:** If it mentions "social well-being," this is a core component.
**Option D:** If it refers to "physical well-being," this is also explicitly included.

**Clinical Pearl / High-Yield Fact**
Remember the **3 pillars**: **Physical**, **Mental**, and **Social**. The WHO definition does **not** include spiritual or environmental aspects. Avoid assuming modern revisions are reflected in this classic definition.

**Correct Answer: C. Social well-being**

✓ Correct Answer: C. Environmental health