**Core Concept**
The Trauma and Injury Severity Score (TRISS) is a widely used scoring system in trauma care to predict patient outcomes and mortality. It combines three components: the Revised Trauma Score (RTS), the Injury Severity Score (ISS), and the patient's age.

**Why the Correct Answer is Right**
The TRISS formula is a combination of the Injury Severity Score (ISS), which assesses the severity of injuries based on the Abbreviated Injury Scale (AIS), and the patient's age. The ISS takes into account the severity of three most severely injured body regions, while the patient's age is a separate factor that affects the predicted mortality. The Revised Trauma Score (RTS), which includes the Glasgow Coma Scale (GCS), systolic blood pressure (BP), and respiratory rate (RR), is an essential component of the TRISS, but it is not explicitly mentioned in the question. However, the correct formula for TRISS is often simplified to ISS + Age.

**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it includes BP and RR, which are part of the RTS, but not ISS or Age.
**Option C:** Incorrect because it includes ISS and GCS, but incorrectly omits Age and includes S, which is not a standard component of the TRISS formula.
**Option D:** Incorrect because it includes S and GCS, but incorrectly omits ISS and includes Age, which is a separate factor.

**Clinical Pearl / High-Yield Fact**
Remember that TRISS is a widely used scoring system in trauma care, and it is essential to understand the components and formula to accurately predict patient outcomes and mortality.

**Correct Answer:**
✓ Correct Answer: B. S + ISS + Age