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
Causes of dysfunctional uterine bleeding can be: 
Select and explain. 
A. Uterine polyp, B. Fibroid, C. Granulosa cell tumour, D. Irregular ripening of endometrium
D: Irregular ripening of endometrium
Answer: D: Irregular ripening of endometrium 
Explanation: Ans. is d and e i.e. Irregular ripening of endometrium; and Irregular shedding of endometrium DUB is defined as a state of abnormal uterine bleeding without any clinically detectable organic pelvic pathology. DUB is of two types : 1. Anovulatory (80%) 2. Ovulatory (20%) Anovulatory (80%) : * Threshold bleeding of pubey menorrhagia Metropathia hemorrhagicadeg/cystic glandular hyperplasiadeg Premenopausal DUB (Atrophy of endometrium). Ovulatory (20%) : Irregular ripeningdeg Irregular sheddingdeg IUCD inseion Following sterilization operation.