The South China Sea is of tremendous strategic importance to world shipping and is believed to hold huge oil and gas reserves. In the context of South China Sea consider the following:  

1.    The South China Sea is a marginal sea that is part of the Pacific Ocean

2.    It is encompassing an area from the Singapore and Malacca Straits to the Strait of the Sea.

3.    China, Philippines, Vietnam, Australia and Malaysia all hold competing to parts of the sea

Which of the above are correct?