This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
[{'content': "The gene affected in Gilber's syndrome is: \nSelect and explain. \nA. UGT1A1, B. MRP2, C. Unknown, D. MRP 3", 'role': 'user'}, {'content': "Answer: A \nExplanation: PARAMETER Syndrome GILBE'S CRIGLER- NAJJAR TYPE I CRIGLER-NAJJAR TYPE II DUBIN-JOHNSON ROTOR'S Incidence 6%-12% Very rare Uncommon Uncommon Rare Gene affected UGT1A1 UGT1A1 UGT1A1 MRP2 Unknown Metabolic defect |Bilirubin conjugation No bilirubin conjugation ||Bilirubin conjugation Impaired canalicular expo of conjugated bilirubin Impaired canalicular expo of conjugated bilirubin Ref: Sleisenger and Fordtran's, E-9, P-326", 'role': 'assistant'}]