Kavita was the lone Indian woman boxer to clinch a medal after she settled for a bronze in the semifinals against Kazakhstan's Yuldus Mamatkulova at World Championships held in Qinhuangdao, China on Friday.Five time World Champion MC Mary Kom has qualified for the London Olympics in the 51 Kg category. The 29-year-old Manipuri is the only Indian woman boxer to qualify for the Games. She qualified despite losing in the quarter finals to World Number 2, Nicola Adams of England.Women's boxing will make Olympic debut in London in three categories, 51 kg, 60 kg and 75 kg categories. The ongoing Championship is the qualifying round for the London Games.