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
A 36 year old lady experiences an electric shock-like sensation typically induced by flexion or other movements of the neck that radiates down the back into the legs and rarely, into the arms. What is this clinical sign called? 
Select and explain. 
A. Hoffmann's sign, B. Lhermitte's symptom, C. Waenberg's sign, D. Tinel's sign
B: Lhermitte's symptom
Answer: B: Lhermitte's symptom 
Explanation: Lhermitte's symptom can occur with cervical spondylosis and multiple sclerosisRef: Harrisons Principles of Internal Medicine, 18th Edition, Page 3398