There are two kinds of seeds classified on the basis of endosperm utilization. These are:
1. Endospermic seeds: These are also called albuminous seeds. These seeds do not completely utilize their endosperm while developing. Due to this, only one of the cotyledons is able to develop completely while the other is not. This is the reason, the cotyledons of endospermic seeds are mostly thin and papery. These type of seeds are mostly found in monocotyledonous plants. For example, maize.
2. Non- endospermic seeds: These seeds are also called ex- albuminous seeds. These are the seeds in which the endosperm is utilized completely. Due to the complete utilization of endosperm, two cotyledons are formed in these seeds which stores the nutrients for the development of embryo. The cotyledons formed in these seeds are thick and fleshy. Due to the complete utilization of endosperm, there is no endosperm remaining, that is why these seeds are called non-endospermic seeds.
Out of the given options, beans are non-endospermic seeds which completely utilize the endosperm.
Castor is an endospermic seed.