The Vedas existed before Sanskrit was written down. At first, how had they been preserved?

Question: The Vedas existed before Sanskrit was written down. At first, how had they been preserved?

There were no original scripts because even the last Veda, Atharvaveda came into existence way before writing did in India. Vedas were preserved from Bronze to Iron age through the oral traditions as written form of communication hadn't developed yet.

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the correct answers are 1, 2 5, 6

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