This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
Treatment of P. Vivax malaria 
Select and explain. 
A. Chlorquine, B. Primaquine, C. Chlorquine + Primaquine, D. None
C: Chlorquine + Primaquine
Answer: C: Chlorquine + Primaquine 
Explanation: P.vivax cases should be treated with chloroquine in full therapeutic dose of 25mg/ kg divided over 3 days. Vivax malaria relapses due to presence of hypnozoites in the liver. For its prevention, primaquine may bd given at a dose of 0.25 mg/kg daily for 14 days under supervision Reference; Park&;s Textbook of preventive and social medicine, 24th edition.Pg no. 279