Listen to Sabse Kathin Rahasyon Par Gyan online. Sabse Kathin Rahasyon Par Gyan is a Hindi language song and is sung by Tarun Khanna. Sabse Kathin Rahasyon Par Gyan, from the album Chanakya Niti, Vol. 2, was released in the year 2021. The duration of the song is 0:42. Download Hindi songs online from JioSaavn.