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: Surgery
50 year old patient comes with jaundice. She has undergone cholecystectomy 3 years back. MRCP reveals choledocholithiasis. What might be the cause 
Select and explain. 
A. Ascaris lumbricoides, B. Clinorchis sinesis, C. Both of the above, D. None of the above
C: Both of the above
Answer: C: Both of the above 
Explanation: Any obstruction or infection of the bile leads to do choledocholithiasis. Common organisms include ascaris lumbricoides and clonorchis sinensis.