Largest Atomic Radius in Alkali Metals

In the context of atomic structure, the periodic table is organized based on various properties such as atomic number, electron configuration, and chemical properties. An important trend observed in the periodic table is the change in atomic radius as you move across a period and down a group. Given the elements lithium (Li), sodium (Na), potassium (K), and rubidium (Rb), which of these elements would have the largest atomic radius?