Have you heard this, oh Pārtha, with concentrated mind? Is your confusion born of ignorance destroyed, oh Dhanamjaya?

Kṛṣṇa verifies understanding. Kaccid — have you? truly? Ekāgrena cetasā — with mind of one-pointedness, concentrated (ekāgra).

Ajñāna-sammohaḥ — confusion/delusion born of ignorance. Pranaṣṭaḥ — destroyed, dissolved. Te — your.

Arjuna must confirm his transformation. The teaching is interactive, requires verification.