Which is the Oldest Veda?
Option 4 is the right answer.
The Rigveda is an ancient Indian sacred collection of Vedic Sanskrit hymns. It is counted among the four canonical sacred texts of Hinduism known as the Vedas.
It is one of the oldest extant texts in any Indo-European language. Philological and linguistic evidence indicate that the Rigveda was composed in the north-western region of the Indian subcontinent, most likely between c. 1500–1200 BCE,though a wider approximation of c. 1700–1100 BCE has also been given.
The Rigveda contains several mythological and poetical accounts of the origin of the world, hymns praising the gods, and ancient prayers for life, prosperity.
The Rig Veda is hard to translate accurately, because it is the oldest Indo-Aryan text, composed in the archaic Vedic Sanskrit. There are no closely contemporary extant texts, which makes it difficult to interpret.