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
Protein synthesis takes place in: 
Select and explain. 
A. Stratum basale., B. Stratum spinosum., C. Stratum granulosum., D. Stratum corneum.
B: Stratum spinosum.
Answer: B: Stratum spinosum. 
Explanation: None