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: Pharmacology
What is the most dangerous effect of belladonna in very young children ? 
Select and explain. 
A. Dehydration, B. Hallucination, C. Hypertension, D. Hyperthermia
D: Hyperthermia
Answer: D: Hyperthermia 
Explanation: None