Oncologist recommendation

Please recommend a good oncologist in the city (for breast cancer).

My mother got the entirety of her treatment - including surgery and radiation - done from chennai. She returned after completing her radiation last week, and the side effects of the radiation have been severe; it looks like her skin on her neck is getting burnt. We know that the side effects of radiation can be severe but we want to get it looked at just to make sure that nothing is going wrong.

I will be taking her to a dermat today and would also like to get an oncology opinion. Please recommend a good one if you know of anyone. Thanks.