This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Tuberculosis of Bone and Joints, Subject name: Orthopaedics
Arrange the following condition according to the worsening stages in TULI's clinical staging a-Paraplegia in extension b- ankle clonus present,extensor plantar response, no sensory deficit c- no sensory deficit , motor deficit,ambulatory with suppo d-Paraplegia in flexion 
Select and explain. 
A. b-c-a-d, B. c-b-a-d, C. c-a-b-d, D. b-a-c-d
A: b-c-a-d
Answer: A: b-c-a-d 
Explanation: Tuli's clinical staging is used for assessment of severity and progression of neural deficit Stage 1 :Patient unaware of neural deficit, physician detects plantar extensor and/or ankle clonus. Stage 2 : Patient aware of deficit but manages to walk with suppo, clumsiness of gait. Stage 3 : Paralysis in extension, sensory deficit less than 50% Stage 4 : III + flexor spasm/ paralysis in flexion/ flaccid/ sensory deficit more than 50%/ sphincters involved