The Alvars were South Indian saints devoted primarily to which of the following deities?

With reference to major Bhakti saints and their literary associations, consider the following pairs: Bhakti Saint — Region Associated — Literary Work / Composition I. Mirabai — Rajasthan — Padavali II. Surdas — Braj region — Sursagar III. Namdev — Tamil Nadu — Abhanga compositions IV. Vallabhacharya — Andhra Pradesh — Brahmasutra-Anubhashya How many of the above pairs are correctly matched?

Which Bhakti saint hailed from a Telugu Tailang Brahmin family and propounded the Shuddhadvaita philosophy?