Is the proclaimed right of a state to declare a federal law void. legislative veto nullification referendum reformation

The correct answer is refers to the right of the states to nullify, or invalidate, any federal law which that state they deemed unconstitutional. The principle of nullification has never been legally upheld by federal courts as the Supremacy clause recognizes the Federal government.

Nullification
State has the right to nullify, or invalidate, any federal law which that state has deemed unconstitutional with respect to the United States Constitution as opposed to the state's own constitution. The theory of nullification has never been legally upheld by federal courts.

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