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 tooth has single antagonist tooth 
Select and explain. 
A. A Maxillary CI and mandibular LI, B. Mandibular CI and maxillary 3rd molar, C. Mandibular 3rd molar and mandibular CI, D. Maxillary 3rd molar and maxillary CI
B: Mandibular CI and maxillary 3rd molar
Answer: B: Mandibular CI and maxillary 3rd molar 
Explanation: None