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
Which one of the following antimalarial drugs is safe for use in, pregnancy ? 
Select and explain. 
A. Atovaquone, B. Tetracycline, C. Proguanil, D. Primaquine
C: Proguanil
Answer: C: Proguanil 
Explanation: None