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: ENT
[{'content': 'Patient is having scanty, foul smelling discharge from middle ear, develops fever, headache and neck rigidity. CT of the temporal lobe shows a localized ring enhancing lesion, which of the following is least likely cause of this condition? \nSelect and explain. \nA. S. aureus, B. Pseudomonas, C. S.Pneumoniae, D. H. influenza', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Commonest organisms in otogenic brain abscess include gram negative (Proteus, E coli, Pseudomonas) and anaerobic bacteria along with Staphylococcus and Pneumocci. H. Influenza infection is a rare cause of otogenic abscess.', 'role': 'assistant'}]