Explanation
Vatican City is the smallest state in the world, with an area of approximately 44 hectares (110 acres) and a population of fewer than 1,000 people. It is an independent city-state enclaved within Rome, Italy, and is the spiritual and administrative center of the Roman Catholic Church.
Monaco, on the other hand, is the second-smallest country in the world after Vatican City. It has an area of approximately 2.02 square kilometers (0.78 square miles) and a population of around 39,000 people.
Peru and Micronesia are not among the smallest states in the world. Peru is a country located in South America, with an area of approximately 496,000 square miles and a population of over 32 million people. Micronesia is a country in the western Pacific Ocean, with a total land area of approximately 702 square kilometers (271 square miles) and a population of around 100,000 people.