This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2018, Subject name: Gynaecology & Obstetrics
A G4P2 lady presented with history of two aboions at 16 weeks and 20 weeks POG. Which of the following could be the most likely reason for these aboions? 
Select and explain. 
A. Chromosomal abnormality, B. Cervical incompetence, C. Placenta pre, D. Thyroid abnormality
B: Cervical incompetence
Answer: B: Cervical incompetence 
Explanation: Aboions- MC causes 1st trimester - chromosomal causes 2nd trimester - Anatomical cause