This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Osteogenic Sarcoma, Subject name: Orthopaedics
[{'content': 'Which of the following is bone forming malignant tumour? \nSelect and explain. \nA. Osteoid osteoma, B. Osteosarcoma, C. Chondrosarcoma, D. Giant cell tumour', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Osteosarcoma o Bone-forming tumours are a sub-set of bone tumours that are characterised by their propensity to form excess osteoid. They can be further subdivided into benign and malignant tumours.Benign tumours# Osteoid osteoma# Osteoblastoma# Bone island (enostosis)# Osteopoikilosis# OsteomaMalignant tumourso Malignant bone-forming tumours are all osteosarcomas.# Osteosarcoma (conventional)# Telangiectatic osteosarcoma# Low-grade central osteosarcoma", 'role': 'assistant'}]