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: Radiology
Spongy appearance with central sunburst calcification is seen in – 
Select and explain. 
A. Pancreatic adenocarcinoma, B. Mutinous cyst adenocarcinomas, C. Somatostatinoma, D. Serous cystadenoma
D: Serous cystadenoma
Answer: D: Serous cystadenoma 
Explanation: "The serous cystadenoma, or microcystic adenoma, is a benign tumor of elderly women, presenting with vague abdominal symptoms. A large calcified mass is often seen, with the calcification having a characteristic sunburst pattern within a central fibrotic scar".