This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Yersinia, Subject name: Microbiology
[{'content': 'Reservoir of plagu e is - \nSelect and explain. \nA. Domestic rat, B. Wild rat, C. Rat flea, D. Man', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is -b' i.e., Wild rat Life cycle of plague bacilliReservoir of infection - Wild rodent (Tetra indica)Vector - Rat flea{Xenopsvlla cheopis in north IndiaXenopsylla astia in south India Modes of transmissionCommensalrats(Rattus rattus)|Rat flea|Man(Most common mode)Wild rodents|Wild rodent flea|Man|Wild rodents (Tetra Indica) peridomestic rodents (Rattus non'egicus). Commensal rodents (Rattus rattus)|Wild rodent fleas, peridomestic rodent fleas, commensal rodents fleas|ManMan|Human flea (pulex irritans)|ManMan|Man (In pneumonic plague)", 'role': 'assistant'}]