Hi Sruthi.

It may not cause a problem because the 'others' option , according to my knowledge , is for other equivalent examination. Since you have completed plus two from the higher secondary board of Kerala , HSC is the correct option. I would advise you to make sure that you have submitted the HSC marksheet without fail.

For more insight regarding the same you can use:

https://medicine.careers360.com/articles/tamil-nadu-mbbs-application-form

Good luck!!