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
All are true about the striae of retzius except 
Select and explain. 
A. Constitute the rest lines with in the enamel rods, B. Have high inorganic content, C. They are areas of increased porosity, D. Allow the movement of water and small ions
B: Have high inorganic content
Answer: B: Have high inorganic content 
Explanation: None