**Core Concept**
The Model for End-Stage Liver Disease (MELD) score is a widely used prognostic tool for assessing the severity of liver disease in patients with cirrhosis. It is based on the patient's serum bilirubin, serum creatinine, and international normalized ratio (INR) for prothrombin time.

**Why the Correct Answer is Right**
The MELD score does not include albumin levels, which are an important factor in assessing liver function. The score is calculated using the following formula: MELD = 10 × log10(INR) + 10 × log10(bilirubin) + 10 × log10(creatinine). Albumin levels are not included in this calculation because they do not accurately reflect the severity of liver disease in patients with cirrhosis.

**Why Each Wrong Option is Incorrect**
**Option A:** Not applicable, as the question is asking for a component that is not included in the MELD score.
**Option B:** Incorrect, as INR (International Normalized Ratio) is a critical component of the MELD score.
**Option C:** Incorrect, as serum creatinine is used in the MELD score to assess kidney function in patients with liver disease.
**Option D:** Incorrect, as serum bilirubin is a key component of the MELD score, reflecting the severity of liver dysfunction.

**Clinical Pearl / High-Yield Fact**
The MELD score is used to prioritize liver transplant candidates and has been shown to be a reliable predictor of mortality in patients with cirrhosis. A higher MELD score indicates a greater need for liver transplantation.

**Correct Answer: A. Albumin levels are not included in the MELD score.**