Final answer:
A Republic is not an example of an unlimited government because it operates based on popular sovereignty and representative leadership, unlike a dictatorship, autocracy, or some monarchies where power is held without constitutional limits.
Step-by-step explanation:
Among the listed options, B. Republic is not an example of an unlimited government. In a republic, the power lies with representatives chosen by the people and operates under a set of laws which the representatives have a say in creating, thus it is not an unlimited government. A republic encourages the principles of popular sovereignty, relies on representatives, and does not have a hereditary ruling class. In contrast, a dictatorship, autocracy, and some forms of monarchy, power is held by a single person or a very small group, and these forms of government can operate without constitutional limits to power, making them examples of unlimited governments.