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
For locating clasp patterns, which block out is used? 
Select and explain. 
A. Parallel block out, B. Shaped block out, C. Arbitrary block out, D. Relief
B: Shaped block out
Answer: B: Shaped block out 
Explanation: None