None of them\text{None of them}None of them
1.43 wb/m21.43\mathrm{\ wb}/\mathrm{m}^21.43 wb/m2
1.96×10−9 Wb/m21.96\times 10^{-9}\mathrm{~Wb}/\mathrm{m}^21.96×10−9 Wb/m2
2.65 Wb/m22.65\mathrm{~Wb}/\mathrm{m}^22.65 Wb/m2
