New Delhi, Feb 16 (ANI): In a major setback to the Samajwadi Party ahead of the assembly polls scheduled next year, the Bharatiya Janata Party (BJP) on Tuesday emerged victorious in the Muzaffarnagar bypolls. BJP's Kapil Deo Agrawal won the Muzaffarnagar seat by 6,000 votes while Congress' Mavia Ali won Deoband seat by 3,400 votes.