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
Safest antimalarial drug during pregnancy is: 
Select and explain. 
A. Mefloquine, B. Pyrimethamine, C. Proguanil, D. Quinine
C: Proguanil
Answer: C: Proguanil 
Explanation: Proguanil