Hi Saravana! Sorry but, you cannot change the category once you have entered and then, you will be considered as General candidate. Your scores will considered with respect to the cutoff of General.

hope this answer helps you.For any further queries, feel free to comment below.

there can be problems and also sometimes there are not any. if you can change the category then you should but if you are not able to do it write it to the authorities.

I hope this helps, all the best.