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
Most common abnormality for 1st trimester aboion is : 
Select and explain. 
A. Trauma, B. Placental and membrane abnormalities, C. Chromosomal abnormalities/ Germ plasm de fect, D. Retroversion
C: Chromosomal abnormalities/ Germ plasm de fect
Answer: C: Chromosomal abnormalities/ Germ plasm de fect 
Explanation: Chromosomal abnormalities/ Germ plasm de fect