Why is Tamil Nadu opposed to NEET?

The Tamil Nadu Assembly on Monday adopted a Bill to dispense with the National Entrance-cum-Eligibility Test (NEET) and provide for admission to medical courses based on Class XII marks to ensure social justice.

The Bills adopted in 2017 for the same purpose during the AIADMK regime did not get the President's assent.

So, why is Tamil Nadu opposed to NEET?

Is NEET elitist or does it promote merit?

Are state board students at a disadvantage?

Is this just a political stunt by DMK govt?