This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pathology of Conception, Subject name: Gynaecology & Obstetrics
[{'content': 'Most common cause of early miscarriages is \nSelect and explain. \nA. Natural diabetes, B. Cervical incompetence, C. Chromosomal abnormality, D. Genitourinary infections', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. c (Chromosomal abnormality). (Ref. Dutta, Obstetrics, 5th ed., 211)ETIOLOGY OF SPONTANEOUS ABORTION/MISCARRIAGE1. Ova- fetal factors (60%)- operate in early abortion.# Chromosomal abnormality (commonest being autosomal trisomy, monosomy)# Gross congenital malformations.# Blighted ovum, hydropic degeneration of villi# Interference with circulation (cord twist)', 'role': 'assistant'}]