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
In osteogenic sarcoma predominant histological finding is ? 
Select and explain. 
A. Giant cells, B. Osteoid forming tumor cells, C. Fibroblastic proliferation, D. Chondroblasts
B: Osteoid forming tumor cells
Answer: B: Osteoid forming tumor cells 
Explanation: 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.