This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lymphoma and Plasma cell disorder, Subject name: Medicine
[{'content': 'Which among the following statements is wrong ? \nSelect and explain. \nA. Light chains are synthesised in slight excess normally in plasma cells, B. Qualitative assessment of M component can be done by electrophoresis, C. M components are detected in chronic myeloid leukaemia, D. In 20% myelomas, only light chains are produced', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Qualitative assessment of M component is done by immunoelectrophoresis. Electrophoresis is used for quantitative assessment of M component. M component can also be detected in other lymphoid malignancies, CML, Ca breast, colon cancer , non neoplastic condition like cirrhosis, sarcoidosis, rheumatoid ahritis, myasthenia gravis.', 'role': 'assistant'}]