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
Two most important tests to be done in a comatose patient with blood glucose of 750 mg/dl will be -a) Sr. creatinineb) Sr. sodiumc) Blood pHd) Blood urea 
Select and explain. 
A. b, B. c, C. ad, D. ab
C: ad
Answer: C: ad 
Explanation: None