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
The highest (longest) and sharpest cusp on the deciduous mandibular first molar is: 
Select and explain. 
A. Mesiolingual, B. Distolingual, C. Mesiobuccal, D. Distobuccal
A: Mesiolingual
Answer: A: Mesiolingual 
Explanation: None