$\begin {array} {1 1} (1)\;5s & \quad (2)\;10s \\ (3)\;50s & \quad (4)\;500s \end {array}$
$\begin {array} {1 1} (A)\;1\: only & \quad (B)\;1 \: 2\: only \\ (C)\;1,2 \: and \: 3\: only & \quad (D)\;All \: are \: correct \end {array}$