should I apply for 2nd round through AIQ ..?? 456 marks obc category

Hii,

Yes, you can definitely apply for 2nd round counseling.

Every year the admission in government college differ according to the cutoff and the difficulty level of the exam and also on the total number of candidates appeared in the exam.

According to your score you have chances for admission in any Dental college or you can apply from management quota or state quota.

You have not mentioned your state otherwise I can suggest you accordingly.

To get the complete list of top colleges you have chances to get admission you can use the below college predictor tool

https://medicine.careers360.com/neet-college-predictor?icn=QnA&ici=qna_answer

To open Copy and paste the link in the new tab

It gives you a detailed analysis of the Top college you can apply for which helps you to make correct choise  and decision while during the counseling.

You can also check cutoff predictor tool from the below link

https://medicine.careers360.com/articles/neet-cut-off

Hope this will help you,

All the very best !!