The shape of tobacco mosaic virus (TMV) is cylindrical, having length $3000 \AA$ and diameter $170 \AA$. If the specific volume of virus is $12.5 \mathrm{ml} / \mathrm{g}$, the molecular mass of $\mathrm{TMV}$ is $\left(N_{\mathrm{A}}=6 \times 10^{23}\right)$
(a) $3.28$
(b) $5.44 \times 10^{-24}$
(c) $5.44 \times 10^{-18}$
(d) $3.28 \times 10^{6}$