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
Retainer of choice in mandibular posterior teeth 
Select and explain. 
A. Full veneer crown, B. Partial veneer crown, C. 3/4 crown, D. 7/8 crown
A: Full veneer crown
Answer: A: Full veneer crown 
Explanation: None