This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General obstetrics, Subject name: Gynaecology & Obstetrics
All of the folowing are known causes of recurrent atoion except: 
Select and explain. 
A. TORCH infections, B. SLE, C. Rhincompatibility, D. Syphilis
A: TORCH infections
Answer: A: TORCH infections 
Explanation: Causes Chromosomal abnormalities Uterine factors Cervical insufficiency Immunological causes Inherited thrombophilias Endocrine causes Infections Systemic disorder (refer pgno:148 sheila 2 nd edition)