B.G 11.31
आख्याहि मे को भवान् उग्ररूपो नमोऽस्तु ते देववर प्रसीद। विज्ञातुमिच्छामि भवन्तमाद्यं न हि प्रजानामि तव प्रवृत्तिम् ॥३१॥
Declare to me — who are you, O fierce one? Salutations to you, O best of gods, be gracious. I wish to know you as the primordial being, for I do not indeed know your origin or nature.
Gīta Bhāshya 11.31
The question “Who are you?” in the context is asked to know various other aspects of the supreme being. It does not mean Arjuna is completely ignorant of the Lord's significance, as he is addressed as 'O Viṣṇu' (in verse 30).
धर्मान्तरज्ञानार्थमेव "को भवान्" इति पृच्छति। यथा कश्चित् किञ्चित् नामादिकं जानन्नपि जातिज्ञानार्थं पृच्छति "कस्त्वं" इति। यदि तमेव न जानाति तर्हि "विष्णो" इत्येव सम्बोधना न स्यात्। "त्वमक्षरम्" इत्यादि च॥३१॥
He asks “Who are you?” only for the sake of knowing another aspect of the nature. Just as someone, even knowing a name or the like, may ask “Who are you?” to know the class or nature. If he did not know him at all, then the address “O Viṣṇu” would not apply. And likewise the statement “You are the imperishable” and so on.
Gīta Tātparya 11.31
The question is in regard to specific qualities and actions concerning Lord Viṣṇu.
विशेषगुणकर्मविषय एव प्रश्नः। "विष्णो" इति सम्बोधनात् ॥३१॥
The question concerns only specific qualities and actions, as inferred from the address "O Viṣṇu".
