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': "Which of the following reflexes is not present at birth – \nSelect and explain. \nA. Asymmetric Tonic Neck Reflex, B. Moro's Reflex, C. Symmetric tonic neck reflex, D. Crossed extensor reflex", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Neonatal reflexes \n\nA number of primitive neonatal reflexes can be elicited in a healthy term neonate.\nThese disappear as the child grows → These reflexes are inhibited by frontal lobes as the child grows.\nThe absence of reflex responses indicates dysfunction of central or peripheral motor function.\nAbnormal persistence of neonatal reflexes is pathognomonic of central motor lesions.\n\nReflexes are\nA. Reflexes present at birth\n\n\xa0Rooting, sucking & swallowing reflexes\nMoro reflex\nPalmar grasp (grasp reflex)\xa0\nCrossed extensor\nAsymmetric tonic neck reflex\xa0 \xa0 \xa0 \xa0 \xa0 \xa0\n\nB.\xa0Reflexes appear after birth\n\nSymmetric tonic neck\xa0\xa0-\xa0appears at 4-6 months\xa0\nParachute reflex -\xa0appears at 8-9 months\xa0\nLandau reflex\xa0-\xa0appears at 10 months', 'role': 'assistant'}]