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
True about bicuspidization: 
Select and explain. 
A. Separation of mandibular molar mesial and distal roots with their respective crown portions, B. Separation or removal of half root with their respective crown portion in mandibular molar, C. Separation or removal of half root without their respective crown portion in mandibular molar, D. Separation or removal of half-crown without their respective root portion in mandibular molar
A: Separation of mandibular molar mesial and distal roots with their respective crown portions
Answer: A: Separation of mandibular molar mesial and distal roots with their respective crown portions 
Explanation: None