This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Polycystic Kidneys, Subject name: Medicine
Which of the following is the most common extra-renal involvement in autosomal dominant polycystic kidney disease? 
Select and explain. 
A. Mitral valve prolapsed, B. Hepatic cysts, C. Splenic cysts, D. Colonic diveiculosis
B: Hepatic cysts
Answer: B: Hepatic cysts 
Explanation: Hepatic cysts are the most common extrarenal manifestations of Adult Polycystic Kidney Disease.