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
Commonest chromosomal anomaly leading to spontaneous aboions is : 
Select and explain. 
A. Trisomy 16, B. Trisomy 21, C. Tetraploidy, D. Turner's syndrome
A: Trisomy 16
Answer: A: Trisomy 16 
Explanation: Trisomy 16