Two magnetic poles revolve around a stationary armature carrying two coil `(c_1 -c'_1, c_2 - c'_2)` as shown in the figure. Consider the instant when the poles are in a position as shown. Identify the correct statement regarding the polarity of the induced emf at this instant in coilsides `c_1` and `c_2` .

`o.` in `c_1,` no emf in `c_2`
`ox` in `c_1,` no emf in `c_2`
`o.` in `c_2,` no emf in `c_1`
`ox` in `c_2,` no emf in `c_1`