The death of Mulayam Singh Yadav's younger son and Akhilesh Yadav's stepbrother, Prateek Yadav, has sparked discussion, as he was known to be fit and a regular gym-goer. According to reports citing postmortem findings, the cause of his death was "massive pulmonary thromboembolism", a serious condition in which a blood clot blocks the arteries in the lungs. "A blood clot in the lungs, medically called pulmonary embolism, is a serious condition that happens when a clot, usually formed in the legs, travels to the lungs and blocks blood flow. It can become life-threatening if not treated on time.