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
A perimenopausal lady with well differentiated adenocarcinoma of uterus has more than half myometrial invasion, vaginal metastasis and inguinal lymph node metastasis. She is staged as: 
Select and explain. 
A. Stage IIIB, B. Stage IIIC, C. Stage IV A, D. Stage IV B
D: Stage IV B
Answer: D: Stage IV B 
Explanation: The lady in above question has cancer spread to inguinal lymph nodes i.e. stage IVB.