Final answer:
In epithelial tissue, the plasma membrane facing the lumen is known as the apical membrane, while the membrane facing the connective tissue is referred to as the basolateral membrane.
Step-by-step explanation:
In epithelial tissue, the portion of the plasma membrane facing the lumen is called the apical membrane. The portion of the plasma membrane facing the connective tissue/interstitial fluid is called the basolateral membrane. Therefore, the correct answer is C) apical : basolateral. Epithelial tissue displays polarity with the apical surface facing the body's exterior or an internal space, and the basolateral surface attaching to the basal lamina, which is part of the basement membrane that provides support and separates the epithelium from the connective tissue beneath.