i did 12th from pcb from nios board ..... after that i did b.com and mba from luvkmow university ...i am eligible for neet exam??? i am 23 years old.

Hi , as per your query I would like to tell you that in order to get eligible for NEET UG exam you must have passed 10+2 or equivalent with Physics, Chemistry, Biology and English as core subjects from a recognized board with minimum 50% for unreserved , 40% for sc/st/obc and 45% PWD which are the aggregate marks of PCB alone and you should be minimum of 17 years as of 31 December 2020 So yes you can appear in NEET as there's no upper age limit for a person to appear in NEET exam .
To know more about neet click here https://www.google.com/amp/s/medicine.careers360.com/articles/neet-eligibility-criteria/amp
Hope this helps