A sample of a paramagnetic salt containing \(3 \times 10^{24}\) atomic dipoles each of dipole moment \(2 \times 10^{-23} \quad \mathrm{~A}-\mathrm{m}^2\) is subjected to a uniform magnetic field of \(880 \mathrm{mT}\) and cooled to a temperature of \(3.5 \mathrm{~K}\). The degree of magnetic saturation achieved is \(10 \%\). If the sample is subjected to a magnetic field of \(990 \mathrm{mT}\) and cooled to a temperature of \(2.1 \mathrm{~K}\), then the total dipole moment of the sample is

1. A \(11.25 \mathrm{~A}-\mathrm{m}^2\)
2. B \(23.5 \mathrm{~A}-\mathrm{m}^2\)
3. C \(15 \mathrm{~A}-\mathrm{m}^2\)
4. D \(75 \mathrm{~A}-\mathrm{m}^2\)