NEW DELHI: Senior Congress leader Sonia Gandhi was admitted to Sir Ganga Ram Hospital late Monday night after she developed respiratory discomfort due to a mild exacerbation of bronchial asthma, hospital authorities said on Tuesday, adding that her condition is now stable.Doctors said the asthma flare-up was triggered by the combined effects of cold weather and high pollution levels in the capital. She was admitted around 10 pm as a precautionary measure for observation and treatment.According to Dr Ajay Swaroop, chairman of the hospital, Gandhi is responding well to treatment and is being managed with antibiotics and other supportive medication.A decision on her discharge will be taken by the treating physicians based on her clinical progress and is likely in a day or two, the hospital said.