The correct option is B a. Endosperm
Endosperm
The aleurone layer is made up of parenchyma cells and forms the outer layer of the endosperm. This layer is also triploid in nature. It is rich in proteins and helps in providing nutrition to the growing embryo for seed germination.
Coleoptile
The coleoptile is a protective sheath that covers the plumule in a monocot seed.
Cotyledons
The cotyledons are the seed leaves that store food for the growing embryo.
Coleorhiza
Coleorhiza is the protective sheath that covers the radicle in a monocot seed.
Final answer
a. Endosperm.