A $1\text{ cm}$ straight segment of a conductor carrying $1\text{ A}$ current in $x$ direction lies symmetrically at origin of Cartesian coordinate system. The magnetic field due to this segment at point $(1\text{m}, 1\text{m}, 0)$ is (A) $1.0 \times 10^{-9} \hat{k}\text{ T}$ (B) $-1.0 \times 10^{-9} \hat{k}\text{ T}$ (C) $\frac{5.0}{\sqrt{2}} \times 10^{-10} \hat{k}\text{ T}$ (D) $-\frac{5.0}{\sqrt{2}} \times 10^{-10} \hat{k}\text{ T}$