This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S., Subject name: Medicine
Hung up knee jerk is seen in: 
Select and explain. 
A. Chorea, B. Cerebral palsy, C. Athetosis, D. None
A: Chorea
Answer: A: Chorea 
Explanation: Ans: aRef: Dr Arup Kundu, 3rd ed, p. 414