This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
Tubule of serous acinar cell gland is lined by? 
Select and explain. 
A. Stratified columnar, B. Simple Cuboidal, C. Simple Columnar, D. Stratified squamous
B: Simple Cuboidal
Answer: B: Simple Cuboidal 
Explanation: None