Which of the following statements is true regarding the term "Regina"?

The term "Regina" is indeed Latin for "queen." This is an important distinction in various contexts, especially in legal and historical references. In criminal law or cases involving the Crown, "Regina" is often used in legal documents to signify cases involving the monarch as the sovereign—the Queen, in this context. It establishes the authority of the Crown within the judicial system and reflects the historical ties between law and monarchy.

Though some of the other options touch on different terms or concepts, they do not accurately define "Regina." For instance, "king" would refer to a different Latin term and does not apply here. Additionally, while the name of a city could be similar to "Regina" (like Regina in Saskatchewan, Canada), it does not pertain to the meaning of the word in Latin. Also, while there are many types of legal documents, "Regina" specifically designates cases involving the Queen rather than indicating any other type of document.