Hello,

Since the course curriculum is decided and set up in a manner that the first year of other medical courses like bsc nursing, BDS, bams, BHMS is same as the ist year of MBBS course..

That is why the seats are reserved for those Persuing bds, bsc nursing, BHMS, bams for mbbs admission.

The only requirement is that they need to qualify neet and their marks will compete with those having same courses, and the higher scorer will get the seat. 

But you need to study the ist year of the MBBS course  you can not skip the year. 

This is not the lateral entry but a reservation quota. 

Hope this helped 

Good luck!