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: Pharmacology
In unconjugated hyperbilirubinemia the risk of kernicterus increases with the use of : 
Select and explain. 
A. Ceftriaxone, B. Phenobarbitone, C. Ampicillin, D. Sulfonamide
D: Sulfonamide
Answer: D: Sulfonamide 
Explanation: None