The magnetic moment produced in a substance of $1 \ gm$ is $6 \times 10^{-7} \ A \cdot m^2$. If its density is $5 \ gm/cm^3$,then the intensity of magnetization (in $A/m$) will be:
- A$8.3 \times 10^6$
- B$3$
- C$1.2 \times 10^{-7}$
- D$3 \times 10^{-6}$
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