Good Afternoon

As you mentioned that you have complete your class 12th and graduation with pcm and now you want to change the stream, so let me clear you that you do not need to repeat class 11th if you are appearing or completed class 12th with any recognised board you will be able to attempt NEET exam, but i suggest you to invest your 2 yrs in 11th and 12th class and study whole syllabus properly it will be very helpful for you neet exam and you will be completely safe from any disturbance in admission and all.

Hope you found it helpful.