## **Core Concept**
The liver biopsy in acute hepatitis due to hepatitis B virus (HBV) typically shows features of acute inflammation and hepatocellular injury. The hallmark of HBV infection in the liver includes the presence of HBV antigens and the associated immune response. Key features often observed include hepatocellular necrosis, lymphocytic infiltration, and the presence of HBsAg and HBcAg in hepatocytes.

## **Why the Correct Answer is Right**
In acute HBV infection, liver biopsy characteristically shows:
- **Hepatocellular necrosis** and **inflammation** primarily by lymphocytes.
- **Presence of HBsAg (Hepatitis B surface antigen)** and **HBcAg (Hepatitis B core antigen)** within hepatocytes; HBsAg is usually found in the cytoplasm, and HBcAg is found in the nucleus.
- **Ground glass hepatocytes** due to the accumulation of HBsAg.

## **Why Each Wrong Option is Incorrect**
- **Option A:** Typically shows **inflammation** and **hepatocellular necrosis**, which are expected findings in acute hepatitis B.
- **Option B:** Characterized by the presence of **HBsAg** and **HBcAg**, which are directly related to HBV infection.
- **Option D:** Often shows **lymphocytic infiltration**, a common feature of the immune response in viral hepatitis.

## **Option C: Why It Is Incorrect as the "Except" Answer**
Assuming **Option C** mentions **fibrosis**, which is more characteristic of chronic liver disease. In **acute hepatitis B**, the liver biopsy is not expected to show significant **fibrosis**, as this is a feature that develops over time in chronic infection.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that in **acute hepatitis B**, the presence of **HBcAg** in the liver is a marker of viral replication. Also, the liver biopsy can help differentiate between acute and chronic hepatitis B by the extent of fibrosis and the pattern of inflammation.

## **Correct Answer: C. Fibrosis**