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
Allergic reactions depends on all except 
Select and explain. 
A. Previous exposure to the drug, B. Dosage of the drug received, C. Pharmacological action of the drug, D. Antigen antibody reaction
B: Dosage of the drug received
Answer: B: Dosage of the drug received 
Explanation: None