Final answer:
The basal portion or protopod of a crustacean's generalized appendage consists of an exopod and an endopod.
Step-by-step explanation:
The correct options for the basal portion or protopod of a crustacean's generalized appendage are:
a. Exopod - Endopod
b. Exite - Endite
c. Epipod - Epithelium
d. Exocuticle - Endocuticle
The correct answer is a. Exopod - Endopod. In biramous appendages, the exopod is the lateral branch, while the endopod is the medial branch. This arrangement is characteristic of crustaceans' appendages.