This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteria, Subject name: Microbiology
[{'content': 'A patient comes with history of unresponsive fever and cough. X-ray revealed pneumonia. Sputum examination showed gram positive, partially acid fast bacteria with branching filaments that grows on sheep blood agar. The most likely etiologic agents is: \nSelect and explain. \nA. Actinomycetes, B. Nocardia, C. Aspergillosis, D. Pneumococci', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., NocardiaRef: (Ananthanarayan, 8th/e, p. 393; 9th/e, p. 394; Harrison, 18th/e, p. 1324; Jawetz, 24th/e, p. 182)The typical morphology of Nocardia is Acid Fast filamentous bacteria with right angle branching.", 'role': 'assistant'}]