The SIT probing the cough syrup tragedy in Madhya Pradesh has arrested Jyoti Soni, the wife of accused doctor Praveen Soni, officials said. Dr Praveen was arrested after prescribing 'Coldrif' cough syrup that led to the loss of lives of at least 24 children. Jyoti is the proprietor of a medical shop from where the tainted cough syrup was sold.