Among the given options, the fruit that is a schizocarp is Desmodium.
A schizocarp is a type of dry fruit that splits into separate one-seeded segments called mericarps upon maturity. In other words, the fruit breaks apart into smaller, individual units, each containing a single seed.
Out of the given options, Desmodium has a fruit that is a schizocarp. Its fruit splits into several segments (mericarps), each containing a single seed, when it's matured. The other options have different types of fruits such as legume (Groundnut), nut (Cashew), capsule (Pride of Barbados) or a legume-like fruit called a loment (Crotalaria), which don't split into mericarps.