World’s largest single exposure of limestone bedrock “Nullarbor Plain” is in which country?

World’s largest single exposure of limestone bedrock “Nullarbor Plain” is in which country?
[A]USA
[B]Australia
[C]Japan
[D]China

Australia
The Nullarbor Plain is in southern Australia, its located on the Great Australian Bight coast with the Great Victoria Desert to its north. It is the world’s largest single exposure of limestone bedrock, and occupies an area of about 200,000 square kilometres (77,000 sq mi).


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