Which among the following was considered as the Tamil Veda?

Nalayira Divyaprabandham

The correct answer is Option (2) → Nalayira Divyaprabandham

The Tamil Veda is generally considered to be the "Nalayira Divyaprabandham".

Some historians suggest that the Alvars and Nayanars initiated a movement of protest against the caste system and the dominance of Brahmanas or at least attempted to reform the system. To some extent this is corroborated by the fact that bhaktas hailed from diverse social backgrounds ranging from Brahmanas to artisans and cultivators and even from castes considered “untouchable”. The importance of the traditions of the Alvars and Nayanars was sometimes indicated by the claim that their compositions were as important as the Vedas. For instance, one of the major anthologies of compositions by the Alvars, the Nalayira Divyaprabandham, was frequently described as the Tamil Veda, thus claiming that the text was as significant as the four Vedas in Sanskrit that were cherished by the Brahmanas.