In albuminous seeds, food is stored in ________ and in non-albumious seeds, it is stored in ___________.

The correct option is D Endosperm, cotyledons

Albuminous seeds are the seeds which have food stored in the special nourishing tissue called as endosperm that remains persistent till maturity. Cotyledons only act as food sucking organs and not food storage organs e.g., Castor seed. Non-albuminous seeds are the seeds which have the stored food and the cotyledons in a special structure called as a kernel. It does not remain until the embryo is mature. e.g. Pea seed.

So, the correct option is 'Endosperm, cotyledons'.