This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ohopedics Oncology, Subject name: Orthopaedics
Osteosarcoma originates from which type of cells 
Select and explain. 
A. Osteocytes, B. Osteoblasts, C. Chondrocytes, D. Osteoclast
B: Osteoblasts
Answer: B: Osteoblasts 
Explanation: BONE TUMOURS CELL OF ORIGIN BENIGN MALIGNANT OSTEOBLAST Osteoma OSTREOSARCOMA CHONDROBLAST CHONDROMA CHONDROSARCOMA CHONDROBLASTOMA OSTEOCHONDROMA OSTEOCLAST GIANT CELL TUMOR MALIGNANT GIANT CELL TUMOUR U M C (MEDULLA) ESINOPHILIC GRANULOMA MYELOMA ANGIOSARCOMA (EWING'S) LYMPHOMA (RCS) FIBROBLAST NON-OSSIFYING FIBROMA FIBROSARCOMA