Srimad Bhagavadgita Sadhaka Sanjivani -Swami Ramsukhdas
"The Yoga of Knowledge as well as the Discipline of Action and Knowledge." This fourth chapter, is designated as 'Jnanakarmasannyasayoga, because in this chapter there is the description of 'Karmayoga' (the Discipline of Action) and 'Sankhyayoga' (the Discipline of Knowledge), in order to attain the Supreme Knowledge i.e., God-realization.
Out of the forty-two verses of this Chapter, in the first quarter of the thirty-first and thirty-eighth verses, and in the third quarter of the second, tenth, thirteenth and fortieth verses, 'na-gana being used there is 'na-vipula' metre; in the first quarter of the sixth verse, 'ra-gana' being used there, is 'ra-vipula metre; in the first quarter of the twenty-fourth verse and in the third quarter of the thirtieth verse, 'bha-gana' being used there, is 'bha-vipula' metre. The remaining thirty-three verses, possess the characteristics of right, 'pathyavaktra', anustup metre.