This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Anatomy
[{'content': 'Most common primary leading to secondaries in pancreas \nSelect and explain. \nA. Lung, B. Breast, C. Colon, D. Stomach', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Metastatic Tumors to pancreas MC site of primary : RCC > Malignant melanoma On autopsy, most common primary : CA Lung Ref: Sabiston 20th edition Pgno : 1544', 'role': 'assistant'}]