If \( \hat{i}, \hat{j} \) and \( \hat{k} \) are unit vectors along \( X, Y \& Z \) Zaxis respect...

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If \( \hat{i}, \hat{j} \) and \( \hat{k} \) are unit vectors along \( X, Y \& Z \) Zaxis respectively, then tick the wrong statement :
(1) \( \hat{i} . \hat{i}=1 \)
(2) \( \hat{i} \times \hat{j}=\hat{k} \)
(3) \( \hat{i} . \hat{j}=0 \)
(4) \( \hat{\mathrm{i}} \times \hat{\mathrm{k}}=-\hat{\mathrm{i}} \)
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