Hello aspirant,

See, AR number is particularly found in Tamil Nadu Medical UG counselling. AR number is the unique number so as to identify the specific application of the candidate and has no specific purpose. It has no relation with the rank number or merit number of the candidate. Anyways, please check the the phase wise allotment list, there you will be able to find the AR number.

Still if you have any problems, feel free to ask in the comment section.

Hope, it helps you.