India has witnessed significant population growth since 1921, driven by various socio-economic factors. Key stages of this growth include:
A significant shift from rural to urban areas has contributed to increased population density in cities.
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?