Sickle cell anaemia is due to:
| 1. | Change of Amino Acid in α-chain of Haemoglobin. |
| 2. | Change of Amino Acid in β-chain of Haemoglobin. |
| 3. | Change of Amino acid in both α and β chains of Haemoglobin. |
| 4. | Change of Amino acid either α or β chain of Haemoglobin. |
Which one of the following conditions, though harmful in itself, is also a potential saviour from a mosquito-borne infectious disease?
| 1. | Thalassaemia | 2. | Sickle cell anaemia |
| 3. | Pernicious anaemia | 4. | Leukemia |