Step 1: Liver transplantation is reserved for severe, irreversible liver disease when other medical or surgical options have been exhausted.
Step 2: Recognised indications include biliary atresia (the commonest indication in children), primary sclerosing cholangitis, and cirrhosis of any cause (the commonest indication group in adults, chiefly chronic hepatitis C and alcoholic liver disease).
Step 3: Hepatitis A is an acute, self-limiting viral infection that resolves without causing chronic liver damage. It does not lead to irreversible disease and so is NOT an indication for transplant. Only the rare fulminant form would even be considered, which is not what plain hepatitis A implies.
Step 4: Therefore the exception is hepatitis A; the other three are accepted indications.