This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdomen and pelvis, Subject name: Anatomy
[{'content': 'Lining of gallbladder mucosa is \nSelect and explain. \nA. Cuboidal, B. Transitional, C. Columnar, D. Squamous', 'role': 'user'}, {'content': "Answer: C \nExplanation: The gallbladder wall's innermost surface is lined by a single layer of columnar cells with an apical brush border of microvilli, very similar to intestinal absorptive cells. Underneath the epithelia is an underlying lamina propria, a muscular layer, an outer perimuscular layer, and serosa. Unlike elsewhere in the intestinal tract, the gallbladder does not have a muscularis mucosa, and the muscular fibres are not arranged in distinct layers. ref - BDC 6e vol2 pg292", 'role': 'assistant'}]