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
What is the effect of administration of large doses of vitamin-K in a newborn? 
Select and explain. 
A. Bulging of posterior fontanel, B. Hemolytic anemia, C. Convulsions, D. Hyperprothombinemia
B: Hemolytic anemia
Answer: B: Hemolytic anemia 
Explanation: Large doses of vitamin K causes hemolysis in G6PD deficiency and anemia, hyperbilirubinemia and kernicterus in newborn.