A rectangular loop of length \(l\) and breadth \(b\) is placed at distance of \(x\) from infinitely long wire carrying current \(i\) such that the direction of current is parallel to breadth. If the loop moves away from the current wire in a direction perpendicular to it with a velocity \(v\), the magnitude of the emf in the loop is : ( \(\mu_0=\) permeability of free space \()\)

1. A \(\frac{\mu_0 i v}{2 \pi x}\left(\frac{l+b}{b}\right)\)
2. B \(\frac{\mu_0 i^2 v}{4 \pi^2 x} \log \left(\frac{b}{l}\right)\)
3. C \(\frac{\mu_0 i l b v}{2 \pi x(l+x)}\)
4. D \(\frac{\mu_0 i l b v}{2 \pi} \log \left(\frac{x+l}{x}\right)\)