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
In mandibular first molar, extra distal root is known as 
Select and explain. 
A. Radix paramolaris, B. Radix entomolaris, C. Tomt’s root, D. None of the above
B: Radix entomolaris
Answer: B: Radix entomolaris 
Explanation: Extra mesial root is known as radix paramolaris