This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pediatrics
[{'content': 'Grisel&;s syndrome is \nSelect and explain. \nA. Glucosaminidase deficiency, B. Atlanto-axial joint dislocation, C. Hexosaminidase deficiency, D. L4-L5 displacement', 'role': 'user'}, {'content': "Answer: B \nExplanation: Grisel's syndromeSpontaneous subluxation of the atlantoaxial joint following peri-pharyngeal inflammation is known as Grisel's syndrome Children are most frequently affected and classically have toicollis associated with neck stiffness or pain upon neck movement(Refer: Nelson's Textbook of Pediatrics, SAE, 1st edition, pg no. 3297, 3298)", 'role': 'assistant'}]