This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cervical Carcinoma, Subject name: Gynaecology & Obstetrics
[{'content': 'Acetic acid staining of cervix shows the following, except: \nSelect and explain. \nA. Squamous metaplasia, B. Cervical carcinoma in situ, C. Cervical polyp, D. Cervical dysplasia', 'role': 'user'}, {'content': "Answer: C \nExplanation: Cervical polyp is a common benign tumor on the surface of the cervical canal which has tissues much like the smooth muscle cells seen in a fibroid. The polyp does not pick up active staining with aceti acid because it has mosty 'resting' cells Acetic acid used coagulate the proteins - make the area Acetowhite. Biopsy taken from this area. Acetic acid staining of cervix shows Cervical carcinoma in situ Cervical dysplasia Squamous metaplasia", 'role': 'assistant'}]