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
A patient with a rational, sensible, calm and composed disposition is: 
Select and explain. 
A. An exacting patient, B. A hysterical patient, C. An indifferent patient, D. A philosophical patient
D: A philosophical patient
Answer: D: A philosophical patient 
Explanation: None