Road tax exemptions for disabled people in tamil nadu

Dear All,

Could you please kindly let me know whether we have road tax exemptions for disabled people in tamil nadu, specifically Chennai. I have booked a Activa DX. So, i kindly am requesting to provide me a answer soon so that i will take care accordingly. 

I also requesting to let me know the exemptions that we can have from tamilnadu government and government of india as well. 

Thanks in Advance. 

Regards, 

Punniakotti