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
Theophylline overdose causes : 
Select and explain. 
A. Bradycardia, B. Seizures, C. Drowsiness, D. Bronchospasm
B: Seizures
Answer: B: Seizures 
Explanation: None