The Australian Constitution Lists a Number of Concurrent Powers at Section

The Australian Constitution lists a number of concurrent powers at section 51.Which of the following statements is not correct concerning concurrent powers?

A) Concurrent powers are those powers able to be exercised by both the Federal and State parliaments.
B) If the Federal parliament has not legislated in relation to a matter listed in section 51 the matter remains within the regulatory authority of the States.
C) If the State parliament has made a law in relation to a matter listed in section 51 and the Federal parliament makes a law in relation to the same matter the law of the Federal parliament will override the State law in the event of inconsistency.
D) When a law of the Commonwealth is inconsistent with a law of the State the law of the State will prevail and the law of the Commonwealth will be invalid to the extent of the inconsistency.