This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Liver, Subject name: Pathology
Which of the following hereditary hyperbilirubinemia is most fatal: 
Select and explain. 
A. Dubin Johnson syndrome, B. Rotor syndrome, C. Crigler - Najjar syndrome type I, D. Crigler - Najjar syndrome type II
C: Crigler - Najjar syndrome type I
Answer: C: Crigler - Najjar syndrome type I 
Explanation: Ans. (c) Crigler - Najjar syndrome type IRef: Robbins pathology 9th ed. /853-54