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
A diabetic patient in the waiting room develops giddiness, sweating and confusion. He is suffering from: 
Select and explain. 
A. Hypertension, B. Ketoacidosis, C. Hypoglycemia, D. Non-ketoacidosis
C: Hypoglycemia
Answer: C: Hypoglycemia 
Explanation: None