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': "Reinke's layer seen in - \nSelect and explain. \nA. Vocal cord, B. Tympanic membrane, C. Cochlea, D. Reissner's membrane", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Reinke’s Edema\n\nIt is diffuse edema of the Reinke’s space (of vocal cords) leading to irreversible fusiform swelling of the vocal cord—usually bilateral.\nCommonest etiology is smoking though extra esophageal reflux, vocal strain and hypothyroidism has also been implicated.\nPatient has a low-pitched hoarse voice; may present as stridor in severe cases.\nTreatment is superior cordotomy (incising the superior surface of vocal cord preserving the medical vibrating edge) through microlaryngoscopy to decompress the edema fluid. The mucosal flap is then replaced after trimming off the excess epithelium.', 'role': 'assistant'}]