Dear Dharam,

According to the new marking scheme, each correct response will carry four marks (+4) and every incorrect response will incur negative one mark (-1). There will be no negative marking for unanswered questions. 

Since, NEET PG has been made a single session examination, no equating or scaling of marks will be required or will be done. 

To know in detail you can refer below link

https://medicine.careers360.com/news/neet-pg-2018-nbe-revises-marking-scheme-and-exam-schedule-328301

Good Luck!!