**Core Concept**
The Revised Trauma Score (RTS) and Injury Severity Score (ISS) are two scoring systems used to assess the severity of injuries in trauma patients. These scores are calculated based on several components that evaluate the patient's physiological condition and the severity of their injuries.

**Why the Correct Answer is Right**
The Revised Trauma Score (RTS) is composed of three components:
- **A.** **Penetrating trauma** is not a component of RTS or ISS.
- **B.** **Glasgow Coma Scale (GCS)** is a component of RTS, which assesses the patient's level of consciousness.
- **C.** **Systolic Blood Pressure (SBP)** is a component of RTS, which evaluates the patient's circulatory status.
- **D.** **Respiratory Rate (RR)** is a component of RTS, which assesses the patient's respiratory status.

**Why Each Wrong Option is Incorrect**
* **Option A:** Penetrating trauma is a type of injury, not a scoring component of RTS or ISS.
* **Option B:** The other components of RTS are **Glasgow Coma Scale (GCS)**, **Systolic Blood Pressure (SBP)**, and **Respiratory Rate (RR)**. Penetrating trauma is not a component.
* **Option C:** There is no other scoring component of RTS other than GCS, SBP, and RR.

**Clinical Pearl / High-Yield Fact**
The RTS and ISS scores are used to predict the mortality risk of trauma patients and guide treatment decisions.

**Correct Answer:** A. Penetrating trauma