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: Pathology
Green discoloration of teeth is seen in: 
Select and explain. 
A. Tetracycline therapy, B. Fluorosis, C. Erythroblastosis fetalis, D. None of the above
C: Erythroblastosis fetalis
Answer: C: Erythroblastosis fetalis 
Explanation: None