Ans: B
$\begin{array}{cl}
& \text{B}\ 000\ 000 \ 000\ 000\ 030_{16} \\
= & 11 \times 16^{15} + 3 \times 16 \\
= & 11 \times (2^4)^{15} + 48 \\
= & 11 \times 2^{4 \times 15} + 48 \\
= & 11 \times 2^{60} + 48
\end{array}$
$\begin{array}{cl}
& \text{B}\ 000\ 000 \ 000\ 000\ 030_{16} \\
= & 11 \times 16^{15} + 3 \times 16 \\
= & 11 \times (2^4)^{15} + 48 \\
= & 11 \times 2^{4 \times 15} + 48 \\
= & 11 \times 2^{60} + 48
\end{array}$
