Physics Question from JEE Main 2023 · 29 January, Shift 1

Two long wires carry equal currents $I$. The first wire runs in from the far left along a horizontal line to the point $B$ and then turns and runs vertically downwards to infinity (the segment $BC$). The second wire runs in from the far right along the same horizontal line to the point $E$ and then turns and runs vertically upwards to infinity (the segment $ET$). The two vertical semi-infinite segments are a distance $a$ apart, and $O$ is the mid-point of $BE$.

The magnitude of the magnetic induction at $O$ is: