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
Heterozygous sickle cell anemia gives protection against - 
Select and explain. 
A. G6PD, B. Malaria, C. Thalassemia, D. Dengue fever
B: Malaria
Answer: B: Malaria 
Explanation: The possession of the sickle cell allele protects these individuals against malaria because the parasite dies when potassium leaks out of RBCs as they become sickle-shaped.
Types of anemia that have protective effect against P. falciparum malaria : -
G6PD deficiency, Sickle cell anemia, Thalassemia, HbC, Pyruvate kinase deficiency