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
4-day-old newborn baby having icterus involving sole, bilirubin level (mg/dl) - 
Select and explain. 
A. 12, B. 8, C. 6, D. 15
D: 15
Answer: D: 15 
Explanation: Dermal staining of bilirubin Described by Kramer
Jaundice progress in cephalocaudal direcon o Divided in 5 zone Zone Bilirubin


4-6 mg/dl - Face
6-8 mg/dl - Trun k & upper abdomen
8-12 mg/dl - Lower abdomen & thign
12-14 mg/dl - Arm & leg 5) > 15 mg/dl - Palm & sol