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
Sign of inoperability of ovarian tumour is : 
Select and explain. 
A. Excrescences over surface, B. Stromel invasion, C. Peritoneal involvement, D. Pelvic metastasis
C: Peritoneal involvement
Answer: C: Peritoneal involvement 
Explanation: Peritoneal involvement