An element $$\Delta l = \Delta x\hat{i}$$ is placed at the origin and carries a large current $$I = 10 \text{ A}$$. The magnetic field on the $$y$$-axis at a distance of $$0.5 \text{ m}$$ from the element of length $$\Delta x$$ of $$1 \text{ cm}$$ is:

A

$$4 \times 10^{-8} \text{ T}$$

B

$$10 \times 10^{-8} \text{ T}$$

C

$$8 \times 10^{-8} \text{ T}$$

D

$$12 \times 10^{-8} \text{ T}$$