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
Ovarian tumor limited to true pelvis with Negative nodes histological confirmed seeding of abdominal poioned surface. The exact grading : 
Select and explain. 
A. III A, B. III B, C. III C, D. IV
A: III A
Answer: A: III A 
Explanation: III A