The four youths were identified as Randhir Singh (21), Diwakar Kumar (22), Mohammad Chanchal (28) and Abhishekh Singh (23) -- all residents of Bihar.
"Two youths were arrested by the Verna police when they were found impersonating as two students at a private school located in Vasco city," a senior police official said.
Randhir Singh and Diwakar Kumar were picked up from the examination centre.
"During interrogation, they told us that two more of their accomplices were appearing in the exam at another private school located at Old Goa near here," he added.
Around 2,000 appeared in NEET in the state.
NEET is being held this year not only for admissions to medical and dental programmes, but also for homoeopathy and ayurveda courses.
Disclaimer: No Business Standard Journalist was involved in creation of this content