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: Gynaecology & Obstetrics
Singnet ring in an ovarian tumour is characteristic of : 
Select and explain. 
A. Krukenberg's tumour, B. Dysgerminoma, C. Granulosa cell carcinoma, D. Papillary cysatadenocarcinoma
A: Krukenberg's tumour
Answer: A: Krukenberg's tumour 
Explanation: Krukenberg's tumour