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: Microbiology
[{'content': 'The efficacy of the moist heat sterilization technique commonly used to sterilize laboratory ware and culture media is tested by using (OR) Sterilisation control for moist heat is \nSelect and explain. \nA. using Bacillus stearothermophilus, B. using non-pathogenic strain of clostridium tetani, C. using chemical indicator, D. using methylene blue', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]