This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pancreas, Subject name: Pathology
Maximum progression to pancreatic carcinoma occurs in? 
Select and explain. 
A. Intraductal papillary mucinous neoplasms, B. Pseudopancreatic cyst, C. Serous cystic neoplasms, D. Mucinous cystic neoplasms
A: Intraductal papillary mucinous neoplasms
Answer: A: Intraductal papillary mucinous neoplasms 
Explanation: Ans. (a) Intraductal papillary mucinous neoplasms(Ref: Robbins 9th/pg 892-894; 8th/pg 900-903)A. Intraductal papillary mucinous neoplasmsIPMNs progress to an invasive cancerB. Solid-pseudopapillary neoplasmsUsually benignC. Serous cystic neoplasmsAlways benignD. Mucinous cystic neoplasms1/3rd associated with invasive adenocarcinoma