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: Pathology
Person having heterozygous sickle cell trait is protected from infection of 
Select and explain. 
A. P. falciparum, B. P. vivax, C. neumococcus, D. Salmonella
A: P. falciparum
Answer: A: P. falciparum 
Explanation: Ans. a. P. falciparum