Out of potato, sweet potato, radish and carrot; make pairs of Homologous organs and Analogous organs.

homologous organs are defined as the organs which have same structure but different functions. Raddish and carrot are a pair of homologous organs as they are modified roots.

analogous organs are defined as the organs which have same functions but different structure. Potato and sweet potato are the analogous organs because they both are grown underground and stores food but potato is a stem whereas sweet potato is a modified root grown underground.