Find out the number of minutes for one day and 12 hours

Question

$\begin{array}{11} (a)\; 24 \times 60 \times 60 \\ (b)\; 24 \times 12 \\ (c)\; 60 \times 60 \\ (d)\; 24 \times 60 \times 60 \times 12 \times 60 \end{array}$