A 25 yr old female presented with malaise and generalized weakness since 6 months. Her appetite is reduced and she has giddiness and palpitations on and off. There was no organomegaly. Laboratory study showed normochromic to hypochromic anaemia, RDW=60, and MCV=50. What is the diagnosis ?
Thalasemia minor
Iron deficiency anaemia
Chronic malaria
Folate deficiency