Match the different types of sports ball listed in List-I with their respective official weight in List-II
Consider the line \[ \vec{r} = (\hat{i} - 2\hat{j} + 4\hat{k}) + \lambda(-\hat{i} + 2\hat{j} - 4\hat{k}) \]
Match List-I with List-II:
Fill in the blank with the correct option. The teacher believed that the student’s sudden lack of interest in class was an ..........., as he had always been enthusiastic and attentive.