Name the mechanism of evolution that must have operated so that population-two evolved from population-one.
| List-I | List-II |
| (A) Thalassemia | (I) 47, XXY |
| (B) Klinefelter’s syndrome | (II) Sex-linked recessive disorder |
| (C) Turner’s syndrome | (III) 45, XO |
| (D) Colour blindness | (IV) Autosomal recessive disease |
If vector \( \mathbf{a} = 3 \hat{i} + 2 \hat{j} - \hat{k} \) \text{ and } \( \mathbf{b} = \hat{i} - \hat{j} + \hat{k} \), then which of the following is correct?