Which amendment granted Oklahoma statehood?

The 46th Amendment to the United States Constitution, which relates to the admission of Oklahoma as a state, is the correct answer. Oklahoma officially became the 46th state of the Union on November 16, 1907. The amendment facilitated Oklahoma’s transition from a territory to statehood, representing a significant moment in the history of American expansion and the incorporation of new states. It reflects the culmination of a series of events including the opening of Indian Territory to settlers and the establishment of a state constitution.

The other amendments listed do not relate to Oklahoma statehood. Instead, they pertain to different aspects or periods of American history. The 12th Amendment deals with the electoral process for the President and Vice President, while the 30th and 51st Amendments also focus on various legislative and procedural changes in governance or civil rights, none of which are connected to the recognition of Oklahoma as a state. Understanding this context highlights the significance of the correct amendment relating to Oklahoma's history and development as a state.