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: Pediatrics
[{'content': "Kernig's sign is seen in – \nSelect and explain. \nA. Pneumonia, B. Acute bacterial meningitis, C. Mental retardation, D. Cerebral palsy", 'role': 'user'}, {'content': "Answer: B \nExplanation: Acute bacterial meningitis \n\nAcute bacterial meningitis is one of the most potentially serious infections occurring in infants and older children.\nIt is commoner in neonates and infants than in older children because their immune mechanism and phagocytic functions are not fully matured.\n\nClinical features of meningitis in children\n\nThe onset is acute and the symptoms are -\nFever\nIrritability\nHeadache\nProjectile vomiting\nShrill cry\xa0\nBulging fontanel\nSeizures\nAltered sensorium\nPhotophobia\nNeck rigidity\nGeneralized hypertonia\nDiplopia\nPtosis\nSquint\n\nSigns\n\nKernig's sign\xa0→\xa0Extension of khee is restricted to less than 135°, when the hip is in 90° flexed position.\nBrudzinski sign\xa0→\xa0On flexing the Neck, there is flexion of the hips and knees.\nTachy cerebrate\xa0→\xa0If skin of the abdomen is lightly scratched, flushing may be seen.", 'role': 'assistant'}]