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
First formed hard tissue in the tooth is: 
Select and explain. 
A. Enamel, B. Dentine, C. Pulp, D. Cementum
B: Dentine
Answer: B: Dentine 
Explanation: Dentin is first hard tissue in tooth to be formed (From DEJ towards pulp).
Enamel is 2nd (just after 1st layer of dentin formed) hard tissue in tooth to be formed (from cuspal or incisal area).