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
All are features of Parkinson's disease, except- 
Select and explain. 
A. Resting tremors, B. Brady or hypokinesia, C. Rigidity, D. Preserved postural reflexes
D: Preserved postural reflexes
Answer: D: Preserved postural reflexes 
Explanation: None