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
The commonest chromosomal abnormality in early spontaneous aboions is : 
Select and explain. 
A. Monosomy, B. Autosomal trisomy, C. Triploidy, D. Tetraploidy
B: Autosomal trisomy
Answer: B: Autosomal trisomy 
Explanation: Autosomal trisomy