Correct option is (c) \(B_0vl \,sin\,\delta\)
A horizontal conductor of length \(l\) lying along the magnetic north-south when moves eastwards with a velocity \(v\) then the emf will induced and magnetic field in last direction will act.
\(E = B_{vertical}\, vl\)
\(B =B_0\)
\(E = B_0vl \,sin\,\delta\)