Jaipur, Feb 2 (ANI): Bollywood star Farhan Akhtar flagged off a marathon on Sunday organized in India's Pink city, Jaipur to promote cleanliness and make the city clean and green. The Marathon was promoted by Sanskriti Yuva Sanstha a non-governmental organistion (NGO) and entered into the 5th successful year with an endeavor to promote love for 'pink city'.