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: Radiology
[{'content': '"Omental caking" in CT scan high possibility that patient is having: \nSelect and explain. \nA. Ca colon, B. Ca pancreas, C. Ca stomach, D. Ovarian tumor', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. D. Ovarian tumorThe thickened omentum produced by "caking" appears as a large soft tissue mass with poorly defined edges. Fat planes are obscured.Following diagnostic signs characterize the lesions of mesentery/omentum according to their appearance:a. Rounded massesNHL (most common), leukemia and ovarian tumor (rare)b. Ill-defined massesNHL, Carcinoma ovary (most common), Colon, pancreas, stomach (rarely)c. Cake-like massesOvarian tumors, NHL and leukemiad. Stellate patternAll types of metastatic disease except lymphomas and leukemias.75% ovarian neoplasms are benign, 21% are malignant, 4% are borderline malignant.', 'role': 'assistant'}]