This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Musculoskeletal system, Subject name: Anatomy
Characterisic microscopic features of Osteogenic sarcoma is 
Select and explain. 
A. Osteoid formation, B. Osteoid formation by Mesenchymal cells with pleomorphism, C. Codmans triangle, D. Predominant osteoclast
B: Osteoid formation by Mesenchymal cells with pleomorphism
Answer: B: Osteoid formation by Mesenchymal cells with pleomorphism 
Explanation: Osteoid formation by Mesenchymal cells with large Pleomorphism Ref :Robbins 8th/1226