(b) Only two statements
Statement 1 is incorrect as China is not a part of the AUKUS alliance; instead, the alliance is aimed at countering China's growing military capabilities.
Statement 2 is correct as the AUKUS partnership is primarily focused on helping Australia build nuclear-powered submarines to strengthen its defence capabilities.
Statement 3 is incorrect as the AUKUS partnership is implementing its decades-long partnership in undersea military systems and strategic technology in the Indo-Pacific region, not the Arctic.
Statement 4 is correct as the U.S. plans to rotate up to four of its Virginia-class submarines through a port in Perth from 2027 as a part of the first phase of implementing the AUKUS agreement.