This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
[{'content': 'Chondritis of aural cailage is most commonly due to which of the following? \nSelect and explain. \nA. Staphylococcus, B. Pseudomonas, C. Candida, D. Both staphylococcus and Pseudomonas', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Perichondritis results from infection secondary to lacerations, haematoma or surgical incisions. It can also result from the extension of infection from diffuse otitis externa or a furuncle of the meatus. Pseudomonas and mixed flora are common pathogens. (Ref: Textbook of ENT, PL Dhingra, 7th edition, pg no. 53)', 'role': 'assistant'}]