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: Social & Preventive Medicine
[{'content': 'Which is not a complication of chicken pox - \nSelect and explain. \nA. Pancreatitis, B. Pneumonia, C. Encephalitis, D. Thrombocytopenia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Complications\n\nThe most common infectious complication of varicella is the secondary bacterial superinfection of the skin, which is usually caused by Streptococcus pyogenes or Staphylococcus aureus.\nThe most common extracutaneous site of involvement in children is CNS.\nVaricella pneumonia is the most serious complication following chickenpox in adults.', 'role': 'assistant'}]