A 2.0 cm segment of a wire, centered at the origin (0, 0, 0) lies along X-axis. It carries a current of 4.0 A in positive X-direction. The magnetic field due to this segment at a point (0, 4.0 m, 0) is [(μ₀/4Aπ) = 10⁻⁷ Tm/A, and i, j and k are unit vectors along X-axis, Y-axis and Z-axis, respectively]:
a. (2.5 × 10⁻¹⁰ T) k
b. -(5.0 × 10⁻¹⁰ T) k
c. (5.0 × 10⁻¹⁰ T) k
d. -(2.5 × 10⁻¹⁰ T) k