GENERAL KNOWLEDGE

Detailed explanation-1: -Avesta, also called Zend-avesta, sacred book of Zoroastrianism containing its cosmogony, law, and liturgy, the teachings of the prophet Zarathushtra (Zoroaster). The extant Avesta is all that remains of a much larger body of scripture, apparently Zarathushtra’s transformation of a very ancient tradition.

Detailed explanation-2: -The religious texts of the Zoroastrian faith of ancient Persia are referred to as the “Avesta.” The oldest part is the Gathas, which includes a collection of hymns and one of the oldest examples of religious poetry attributed to the prophet Zoroaster (ca. 630–550 BCE).

Detailed explanation-3: -The legends run as follows: The twenty-one nasks ("books") of the Avesta were created by Ahura Mazda and brought by Zoroaster to his patron Vishtaspa (Denkard 4A, 3A).