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
Absent ankle jerk and extensor plantar response is found in: 
Select and explain. 
A. Friederich's ataxia, B. Tabes dorsalis, C. SACD, D. Vit B deficiency
A: Friederich's ataxia
Answer: A: Friederich's ataxia 
Explanation: Answer is A (Friedreich's Ataxia): Absent ankle jerk with extensor planter response is characteristic of Friedreich's ataxia.