Thalassemia gives protection against-: (A) Filaria, (B) Kala-azar, (C) Malaria, (D) Leptospirosis
Answer is C. ROBBINS BASIC PATHOLOGY . 9/eChapter red cells and bleeding disorders .pg number413. There will be decreased synthesis of alpha or beta chains of hb. The malarial pathogens cannot survive due to decreased oxygen. Option 3 is correct.