This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous System, Subject name: Surgery
[{'content': 'Hoffman Tinel sign is seen in? \nSelect and explain. \nA. Deep Vein Thrombosis, B. Nerve regeneration, C. Pulmonary embolism, D. Upper motor neuron lesion', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) Nerve regenerationRef.: Bailey & Love 26th ed. 1471* Hoffman Tinel sign is seen in nerve regeneration and should not be confused with Homan sign seen in deep vein thrombosis.* Hoffman reflex is elicited by a reflex test which verifies the presence or absence of lesions in the cortico-spinal tract. It is also known as the finger flexor reflex. The test involves tapping the nail or flicking the terminal phalanx of the middle or ring finger. A positive response is seen with flexion of the terminal phalanx of the thumb.', 'role': 'assistant'}]