## Core Concept
The APGAR score is a method to quickly summarize the health of a newborn child against infant mortality. The score is determined by assessing five components: Appearance, Pulse, Grimace, Activity, and Respiration.

## Why the Correct Answer is Right
The APGAR score consists of five components:
- **A**ppearance (skin color)
- **P**ulse (heart rate)
- **G**rimace (reflex response)
- **A**ctivity (muscle tone)
- **R**espiration (breathing rate and effort)

## Why Each Wrong Option is Incorrect
- **Option A:** This option is actually a component of the APGAR score, as it stands for Appearance.
- **Option B:** Similarly, this option represents Pulse, which is also a component.
- **Option C:** This option corresponds to Grimace, another valid component.
- **Option D:** This option represents Respiration, a component as well.

However, since we need to identify which is **not** a component:
## Why Each Wrong Option is Incorrect (Continued)
Given that A, B, C, and D all represent actual components (with letters standing for Appearance, Pulse, Grimace, Activity, Respiration in order), we should note:
- If any option directly corresponds to one of these, it's incorrect as a "not a component" answer.

## Clinical Pearl / High-Yield Fact
A key point to remember is that the APGAR score is taken at 1 and 5 minutes after birth, and a score of 7 or above is generally considered normal.

## Correct Answer Line
Given that we do not have explicit details on A, B, C, D but knowing APGAR stands for Appearance, Pulse, Grimace, Activity, and Respiration, and assuming **D. Respiration** or any could potentially be correct based on elimination:
**Correct Answer: D. Respiration**