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
Hung-up reflexes are seen in 
Select and explain. 
A. Chorea, B. Atheotosis, C. Cerebral palsy, D. Cerebellar palsy
A: Chorea
Answer: A: Chorea 
Explanation: Ans. is 'a' i.e., Chorea Hung up knee jerk When patellor tendon is tapped while the foot is hanging free, the leg may be held in extension for few seconds before relaxing owing to prolonged contraction of quadriceps. This is seen in "chorea". Other neurological signs associated with chorea Milkmaids grip Piano sign Handwriting Milkmaid's grip Inability to maintain sustained voluntary contraction of muscle group at a constant level. Inability to apply steady pressure during handshake leading to a characteristic squeeze and release of grip. Patient's have difficulty maintaining sustained eyelid closure and sustained tongue protrusion