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
In Munsell scale, chroma is measured: 
Select and explain. 
A. Along cirumference., B. Along vertical axis., C. Radially., D. Along horizontal axis
C: Radially.
Answer: C: Radially. 
Explanation: None