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Equation of y-axis in space, in vector form is :

Solution

✅ Correct Option: 4

The y-axis passes through the origin (0,0,0)(0, 0, 0) and is in the direction of j^=(0,1,0)\hat{j} = (0, 1, 0).

Vector form: r⃗=(0,0,0)+λ(0,1,0)\vec{r} = (0, 0, 0) + \lambda (0, 1, 0).

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