Question

3. Why was Arjuna upset with Drona when he realised that Eklavya was a better archer than him?​

Answer 1

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Arjuna upset with Drona when he realised that Eklavya was a better archer than him because Dronacharya had said to Arjuna that there will be no better archer than him in the world. So he and worried that Ekalavya had excelled him in the skill of bow and Arjuna suggested Drona take action for this treachery.