20. X linked sideroblastic anemia is caused by mutation in
[1] ALAS2
[2] ALAS1
[3] SLC25A38
[4] SLC19A2
Answer = [1] ALAS2
X-linked sideroblastic anemia (XLSA) is the most common of the congenital SAs caused by mutation in Erythroid 5-aminolevulinate synthase (ALAS2) gene.