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': 'An infant of 5 months presents with sudden dropping of head and flexion of arms. On examination, infant has hypopigmented macule on trunk. What is the drug of choice for this condition \nSelect and explain. \nA. Vigabatrin, B. Sodium Valproate, C. Ethosuccimide, D. ACTH', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Sudden dropping of head and flexion of arms\xa0⇒ Salam spells\nIt is seen in west syndrome.\nHypopigmented macules on trunk\xa0⇒ Tuberous sclerosis\nDrug of choice:\na) West syndrome\xa0⇒ ACTH\nb) West syndrome + Tuberous Sclerosis\xa0⇒ Vigabatrin', 'role': 'assistant'}]