question_answer

Which one of the following conditions though harmful in itself, is also a potential saviour from a mosquito bome infectious disease?

A)  Pernicious anaemia

B)  Leukaemia

C)   Thalassaemia

D)  Sickle cell anaemia

Correct Answer: D

Solution :

                 Sickle cell anamia is a genetic disorder in which abnormal haemoglobin is formed because valine replaces glutamic acid at the sixth position in                                                                                                                           -chain. But the persons having this disease do not suffer from malaria as the parasite fails to thrive in such RBCs.