This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sensory System, Subject name: Physiology
[{'content': 'Stereognosis will be lost in the lesion of: \nSelect and explain. \nA. Fasciculus gracilis, B. Fasciculus cuneatus, C. Anterior spinothalamic tract, D. Lateral spinothalamic tract', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Stereognosis is the ability to identify an object by its touch, texture. The object is placed in hands and is identified without seeing it. Fine touch sensation from the upper limb is carried toward coex in fasciculus cuneatus. The tract also carries the finer aspects of touch. Perception of touch occurs in the somatosensory coex I (areas 3, 1, 2); analysis and interpretation of the touch is done in the somatosensory coex II (areas 5, 7).', 'role': 'assistant'}]