Answer
${I_{circ}}=0$
Work Step by Step
We know that on the circle, the parallel component of the magnetic field is zero and we have only perpendicular component. Thus, $\Sigma B_{||}\Delta L=0$
Now, according to Amperes's law
$\Sigma B_{||} \Delta L=\mu_{\circ}I_{\circ}=0$
$\implies {I_{circ}}=0$
