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: Medicine
Ranson scoring for acute pancreatitis includes -a) Age > 55 yrb) WBC > 16000/ 1c) BUN > 10 mg/d1d) LDH > 700 lU/I 
Select and explain. 
A. ac, B. a, C. ad, D. ab
D: ab
Answer: D: ab 
Explanation: None