A) \[\overrightarrow{r}.\,\,(\hat{i}+\hat{j}+\hat{k})=2\]
B) \[\overrightarrow{r}.\,\,(2\hat{i}+\hat{j}-\hat{k})=2\]
C) \[\overrightarrow{r}.\,\,(2\hat{i}-\hat{j}-\hat{k})=1\]
D) \[\overrightarrow{r}.\,\,(2\hat{i}+3\hat{j}-4\hat{k})=4\]
E) None of these
Correct Answer: A
Solution :
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