In a certain system, $1$ unit of time is $5\;sec,$ 1 unit of mass is $20 \;kg$ and 1 unit of length is $10 m$. In this system $1$ unit of power corresponds to

Question

$$(a)\;16\;watts\quad (b)\;\frac{1}{16} watts\quad  (c)\;25 \;watts \quad (d)\;none\;of\;these$$