Answer: B) "Patients with P. vivax malaria experience relapse with increased frequency over time."
Step-by-step explanation:
The relapse is likely to occur in P. vivax malaria. The P.vivax is the dormant parasite remain in the liver. As the time passes the relapse with this parasite becomes less frequent and stops entirely. The relapse does not occur with the strain of P. falciparum malaria. This is because the P. falciparum does not produce hypnozoites that can become dormant. Thus the symptoms of P. falciparum appear at irregular intervals as compared to the P. vivax whose symptoms remain at peak at every 48 hours. The drug resistance for P. vivax is also uncommon.