This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Haematology, Subject name: Pathology
[{'content': 'Commonest site of lytic lesion in multiple myeloma is \nSelect and explain. \nA. Veebral column, B. Femur, C. Clavicle, D. Pelvis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The bones most commonly affected in multiple myeloma in descending order of frequency are veebral coloumn,ribs, skull, pelvis, femur, clavicle and scapula Ref:Robbins and Cotran Pathologic basis of disease.South Asia Edition volume 1.Page no.599', 'role': 'assistant'}]