This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
[{'content': 'Drug-induced lupus antibodies are found in - \nSelect and explain. \nA. Anti-histone antibody, B. Anti-Rho, C. Ds-DNA, D. Anti-Sm', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Drug-induced lupus erythematosus \n\nA lupus like syndrome may develop in patients receiving a variety of drugs,\nProcainamide and hydralazine are the most common offenders,\nMost patients do not have symptoms of lupus erythematosus.\nAnti-ds DNA antibody is rare\nThere is an extremely high frequency of antihistone antibodies.\nAlthough multiple organs may be affected by renal and CNS involvement, usually does not occur.', 'role': 'assistant'}]