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: Microbiology
Senescent RBC's are mainly attacked in- 
Select and explain. 
A. Vivax malaria, B. Ovale malaria, C. Falciparum malaria, D. Quartan malaria
D: Quartan malaria
Answer: D: Quartan malaria 
Explanation: P. malariae which attacks mainly senescent (old) RBC’s: Agent of Quartan malaria
P. ovale and P. vivax: attack younger RBCs and reticulocytes: Agent of benign tertian malaria
P. falciparum: attacks RBC of all ages: Agent of malignant tertian malaria.