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
Dysfunctional uterine bleeding is defined as abnormal bleeding due to : 
Select and explain. 
A. Thyroid dysfunction, B. Functioning ovarian tumour, C. Anovulatory cycle, D. Blood dyscrasias
C: Anovulatory cycle
Answer: C: Anovulatory cycle 
Explanation: Anovulatory cycle