<prompt> Most common site of CIN is :Squamo-coiumnar junctionEctocervixEndocervixNabothian gland  <response>: Ans: A Squmao... CIN: The metaplasia extends from the original squamocolumnar junction squamosquamous outside to the newly deve!opedphysio!ogicallv active squamocolumnar junctionnowr squamocolumnar inside. This area is transformation zone- Dutta Gynae. 6th321 