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: Medicine
[{'content': 'Dental operator having highest risk of infection from: \nSelect and explain. \nA. Scabies, B. Hepatitis B, C. AIDS, D. Hepatitis E', 'role': 'user'}, {'content': 'Answer: B \nExplanation: HBV is very highly infectious, far more that HIV. Any object or procedure than can convey minute traces of infected blood or other material, as little as 0.00001 ml, can be infectious. These include shared\xa0 syringes, needles and other sharp items or endoscopes, personal articles such as razors, nail clippers or combs, and practices such as acupuncture, tattooing, ritual circumcision, ear\xa0 or\xa0 nose\xa0 piercing,\xa0 and\xa0 field\xa0 camps\xa0 for\xa0 surgery or disease detection by blood testing where separate sterile articles may not\xa0 be\xa0 available. Professionals using sharp articles like barbers, dentists and doctors may unwittingly transmit the virus if great care is not taken.\nReference: Ananthanarayan Microbiology\xa0 8th edition page no\xa0 550', 'role': 'assistant'}]