This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cervical intraepithelial and cervical cancer screening, Subject name: Gynaecology & Obstetrics
[{'content': 'Most common site of CIN is : \nSelect and explain. \nA. Squamo-coiumnar junction, B. Ectocervix, C. Endocervix, D. Nabothian gland', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans: A (Squmao...) "CIN: The metaplasia extends from the original squamocolumnar junction( squamosquamous) outside to the newly deve!oped(physio!ogicallv active) squamocolumnar junction(nowr squamocolumnar) inside. This area is transformation zone"- Dutta Gynae. 6th/321', 'role': 'assistant'}]