(I) Movement of cytoplasm around vacuoles in clockwise and anticlockwise manner occurs in Hydrilla.
(II) Heteropycnosis refers to the property of differential stainability of chromatin.
(III) Dissolution of synaptonemal complex occurs in diplotene of Meiosis-I
(IV) Either clockwise or anticlockwise movement of cytoplasm around the vacuoles occurs in Rheo discolor
$\begin {array} {1 1} (1)\;(I),(III) & \quad (2)\;(II),(III) \\ (3)\;(II),(IV) & \quad (4)\;(I),(IV) \end {array}$
