**Core Concept**
Fibrolamellar carcinoma (FLC) is a rare subtype of primary liver cancer characterized by its distinct histological features, such as a fibrous stroma and a lack of cirrhosis. Unlike hepatocellular carcinoma (HCC), FLC tends to occur in younger individuals without underlying liver disease.

**Why the Correct Answer is Right**
FLC has a better prognosis compared to HCC due to its unique characteristics. FLC typically presents in the second or third decade of life, whereas HCC is more common in older individuals with underlying liver disease such as cirrhosis. This difference in demographics and underlying pathology contributes to the improved prognosis of FLC. Additionally, FLC tends to be more amenable to surgical resection and has a higher likelihood of being diagnosed at an early stage, both of which contribute to its favorable outcome.

**Why Each Wrong Option is Incorrect**
**Option A:** This statement is incorrect as FLC is not necessarily "good" in the sense of having excellent prognosis, but rather its prognosis is better compared to HCC.
**Option B:** FLC is more common in young adults, not old age, making this statement incorrect.
**Option C:** FLC is characterized by the absence of cirrhosis, making this statement incorrect.
**Option D:** FLC is not associated with hepatitis B infection, which is a major risk factor for HCC, making this statement incorrect.

**Clinical Pearl / High-Yield Fact**
A key distinguishing feature of FLC is its lack of association with underlying liver disease, such as cirrhosis. This is in contrast to HCC, which often arises in the setting of chronic liver disease. Remembering this distinction can help in differentiating between these two types of liver cancer.

**✓ Correct Answer: A. Good prognosis than hepatocellular carcinoma**