The correct chronological sequence of eras is :

$\begin {array} {1 1} (1)\;Mesozoic \: \rightarrow\: Coenozoic\: \rightarrow \: Archaeozoi & \quad (2)\;Coenozoic \: \rightarrow\: Proterozoic \: \rightarrow\:Mesozoic \\ (3)\;Palaeozoic \: \rightarrow\: Mesozoic\: \rightarrow\: Coenozoic & \quad (4)\;Palaeozoic\: \rightarrow\: Archaeozoic\: \rightarrow\: Coenozoic \end {array}$