What was the cause for Duryodhana’s exultation?

1.	What was the cause for Duryodhana’s exultation?
Answer» after Arjuna’s exhibition of his superhuman skill with his weapons, with Drona’s permission, Kama, then and there, duplicated all Aijuna’s feats with careless ease. This made Duryodhana feel exulted.

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