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
Unilateral edentulous area with natural teeth both anterior and posterior to it represent Kennedy's arch. 
Select and explain. 
A. Class I, B. Class II, C. Class III, D. Class IV
C: Class III
Answer: C: Class III 
Explanation: None