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
Chemoprophylaxis in an Englishman visiting chloroquine and mefloquine ersistant malaria region is done with - 
Select and explain. 
A. Primaquine, B. Doxycycline, C. Amodiaquine, D. Hydroxychloroquine
B: Doxycycline
Answer: B: Doxycycline 
Explanation: Ans. is 'b' i.e., Doxycycline