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': 'What is the effect of administration of large doses of vitamin-K in a newborn? \nSelect and explain. \nA. Bulging of posterior fontanel, B. Hemolytic anemia, C. Convulsions, D. Hyperprothombinemia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Large doses of vitamin K causes hemolysis in G6PD deficiency and anemia, hyperbilirubinemia and kernicterus in newborn.', 'role': 'assistant'}]