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: Radiology
Which of the following is not an inherent property of radiograph: 
Select and explain. 
A. Definition, B. Contrast, C. Density, D. Sharpness
D: Sharpness
Answer: D: Sharpness 
Explanation: 3 inherent qualities of radiograph are:

Definition
Contrast
Density