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: Pathology
The genetic defect in Dubin-Johnson syndrome is - 
Select and explain. 
A. Mutation in gene for multiple drug resistance protein 2, B. Mutation in UDP-glucuronyl transferase, C. Mutation of chromosome 23, D. Flash mutations
A: Mutation in gene for multiple drug resistance protein 2
Answer: A: Mutation in gene for multiple drug resistance protein 2 
Explanation: None