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
Which of the following does not require radiograph: 
Select and explain. 
A. Tanaka and Johnson, B. Hixon - old father., C. Stanley and Kerber, D. Nance model analysis
A: Tanaka and Johnson
Answer: A: Tanaka and Johnson 
Explanation: None