The point of intersection of r→×a→=b→×a→ and r→×b→=a→×b→, where a→=i^+j^ and b→=2i^-k^ is

Question

The point of intersection of

\vec{r} \times \vec{a} = \vec{b} \times \vec{a}

and

\vec{r} \times \vec{b} = \vec{a} \times \vec{b},

where

\vec{a} = \hat{i} + \hat{j}

and

\vec{b} = 2 \hat{i} - \hat{k}

3 \hat{i} + \hat{j} - \hat{k}

3 \hat{i} - \hat{k}

3 \hat{i} + 2 \hat{j} + \hat{k}

None of these

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