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 maxillary 1st permanent molar, the 2 obtuse angles are 
Select and explain. 
A. Mesiolingual and mesiofacial, B. Mesiofacial and distolingual, C. Distofacial and mesiolingual, D. Distofacial and mesiofacial
C: Distofacial and mesiolingual
Answer: C: Distofacial and mesiolingual 
Explanation: None