Rh-factor can produce disease:
| 1. | AIDS |
| 2. | Turner's syndrome |
| 3. | Erythroblastosis foetalis |
| 4. | Sickle cell anaemia |
| Assertion (A): | Nearly 20% of humans have Rh antigens. |
| Reason (R): | Rh antigen is named after Rhesus monkeys. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true, but (R) is not the correct explanation of (A). |
| 3. | (A) is true, but (R) is false. |
| 4. | (A) is false, but (R) is true. |