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': "Which of the following is true regording singer's nodule \nSelect and explain. \nA. Laser theropy is tratment of choice, B. Requires excision as it potentially malignant, C. Most common symptom is pain, D. It occurs at junction of anterior 1/3rd 7 posterior 2nd", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Is berign not maligrant\nMicro laryngeal surgery is treatment of choice\nM/C symptom is haarsness of voice', 'role': 'assistant'}]