A) \[\hat{i}+\hat{k}\]
B) \[-\,\hat{i}+4\hat{j}-\hat{k}\]
C) \[\frac{1}{3}(-\,\hat{i}+4\hat{j}-\hat{k})\]
D) \[\frac{1}{3}(\,\hat{i}-4\hat{j}+\hat{k})\]
Correct Answer: C
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