Which Oceanian country has Rennell and Bellona as its southernmost province?

Solomon Islands is the Oceanian country whose southernmost province is Rennell and Bellona.

Rennell and Bellona Province consists of the inhabited raised coral atolls of Rennell and Bellona, plus the uninhabited Indispensable Reef. Its provincial capital is Tigoa, on Rennell Island. The province lies at the southern end of the Solomon Islands country and is geographically distinct from the larger Melanesian island groups farther north.

The province is notable for its Polynesian identity. Rennell and Bellona are Polynesian outliers within a predominantly Melanesian nation, and Rennellese is a Samoic language spoken there. Rennell is also famous for Lake Tegano, a large brackish lagoon and a UNESCO World Heritage site.

The province became one of Solomon Islands’ nine provinces in 1993. It is sometimes confused with Tonga or Fiji because of its Polynesian cultural connections, but its political status is clear: Rennell and Bellona are administered by Solomon Islands.