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
Human races may be Dolichocephalic , when index is 
Select and explain. 
A. 75 or less, B. 75-80, C. Above 80, D. None of the above
A: 75 or less
Answer: A: 75 or less 
Explanation: Dolichocephalic or long headed when the index is 75 or less.