Why did Lord Krishna says that He is Arjuna among the Kauravas in Gita verse 10.37?

[A question by Ms. Laxmi Thrylokya]

Swami Replied:- God Krishna preached the Spiritual knowledge to the world in the form of questions and answers and this is the best way of preaching the knowledge. The form of questions and answers will create interest because a question is concentrated on a specific concept. The answer will also concentrate on that specific concept in all angles. Since the concept is from God, only God has to frame a question on it and only God has to answer it since He is the author of the concept. Even in commentaries of divine preachers, the question (Pūrvapakṣa) is framed by them only and is also answered (Siddhānta) by them only. Hence, God asked the questions through Arjuna and answered them as Krishna.