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': "True about ludwig's angina -a) Rapidly spreading cellulitis of neckb) H. Influenzae is most common organismc) Edema of floor of mouthd) Sub- lingual and sub- maxillary spaces are involvede) When operated ↓GA chances of aspiration, shock can develop \nSelect and explain. \nA. abd, B. acd, C. bde, D. cde", 'role': 'user'}, {'content': "Answer: D \nExplanation: Clinical features \n\nIn Ludwig's angina there is usually cellulitis of the tissue rather than frank abscess.\nMarked difficulty in swallowing (odynophagia).\nVarying degrees of trisumus.\nOn involvement of sublingual space, floor of the mouth is swollen, oedematous and tongue seems to be pushed up and back.\nOn involvement of the submaxillary space the submental and submandibular regions become swollen and tender and impart woody- hard feel. Tongue is progressively pushed upwards and backwards threatening the airway.\nLaryngeal edema may appear.\n\nComplications\n\nAspiration pneumonia and septicemia.\nAirway obstruction due to laryngeal edema or swelling and pushing back of tongue.\nSpread of infection to parapharyngeal and retropharyngeal space and thence to the mediastinum.", 'role': 'assistant'}]