Need suggestions for best dentist in ranchi

Hello everyone, Could you please suggest the best dentist at an affordable rate in Ranchi? My mom is experiencing severe tooth pain and probably needs a root canal treatment (RCT) for her molar tooth. We visited a dentist six months ago, but the prescribed medicine caused a severe stomachache after a week. She was in so much pain that we had to rush her to the hospital. Since then, she is scared to visit a dentist.