The ratio of the cohorts of the first two subclasses of Dicotyledonae in Bentham and Hooker classification is :

Question

$\begin {array} {1 1} (1)\;1 : 1 & \quad (2)\;2 : 3 \\ (3)\;5 : 7 & \quad (4)\;3 : 2 \end {array}$