This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ovarian Tumors and Vulvar cancer, Subject name: Gynaecology & Obstetrics
[{'content': "Which of the following Ovarian neoplasm shows Rokitansky's protuberance: \nSelect and explain. \nA. Androblastoma, B. Mucinous cyst adenoma, C. Dermoid cyst, D. Papillary serous cyst adenoma", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Rokitansky protuberance is seen in both X-ray and USG on Dermoid cyst as Radiopaque and Hyperechoic respectively. Site where the most varied tissue types are found Common location of Malignant transformation Rokitansky protuberance is a rounded mural nodule that measures 1 to 4 cm, and creates an acute angle with the cyst wall', 'role': 'assistant'}]