This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Virology, Subject name: Microbiology
[{'content': 'Variola is a type of which pox virus? \nSelect and explain. \nA. Parapoxvirus, B. Orthopoxvirus, C. Yatapox virus, D. Molluscipox virus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: ANSWER: (B) Orthopox virusREF: Jawetz 24th ed chapter 34 table 34-2 POXVIRUSES CAUSING DISEASE IN HUMANSGenusVirusPrimary hostDiseaseOrthopoxvirusVariolaHumansSmallpox (now eliminated) VacciniaHumansLocalized lesion; used for smallpox vaccination BuffalopoxWater buffaloHuman infections rare; localized lesion MonkeypoxRodents, monkeyHuman infections rare; generalized disease CowpoxCowHuman infections rare; localized ulcerating lesionParapoxvirusOrfSheepHuman infections rare; localized lesionPseudocowpoxCowsBovine papular stomatitisCowsM olluscipoxvirusMolluscumcontagiosumHumansMany benign skin nodulesYatapoxvirusTanapoxMonkeysHuman infections rare; localized lesion YabapoxMonkeysHuman infections very rare and accidental; localized skin tumors', 'role': 'assistant'}]