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
Enamel is soft and acid insoluble in routine preparation after formalin fixation if : 
Select and explain. 
A. Hypomineralized., B. Hypoplasia., C. In both Cases., D. Never become soft.
B: Hypoplasia.
Answer: B: Hypoplasia. 
Explanation: None