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
Which of the following is not typical of Parkinson’s disease 
Select and explain. 
A. Rigidity, B. Myoclonus, C. Tremors, D. Bradykinesia
B: Myoclonus
Answer: B: Myoclonus 
Explanation: Triad in PD is rigidity, bradykinesia and tremor.