Bhagavad GitaBy -- / 29 November, 2010 16 December, 2010 Q. In BG Chapter 4,beginning Krishna says that he instructed the imperishable science of yoga to sun god Vivasavan. I am curious as to which Avatar does this happened. A. Each time Krsna appears to deliver Bhagavad-gita, it is as Vasudeva Krsna.