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: Medicine
The cardinal features of Parkinson’s syndrome include 
Select and explain. 
A. Constant fine tremor, B. Muscle atrophy, C. Pupillary constriction, D. Akinesia
D: Akinesia
Answer: D: Akinesia 
Explanation: None