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: Surgery
[{'content': 'In osteogenic sarcoma predominant histological finding is ? \nSelect and explain. \nA. Giant cells, B. Osteoid forming tumor cells, C. Fibroblastic proliferation, D. Chondroblasts', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Osteoid forming tumor cells Histologic appearance of osteosarcoma It appears pale and extending through the coex on gross cut section examination. On histological sections it consists of malignant stromal tissue showing osteoid formation. Osteoid bone formation by tumor cells is diagnostic of OGS.", 'role': 'assistant'}]