The correct option is B massive vimanas or towers
The holy place of Chola temples were both in a circular and square shape. Special vimanas were built on the upper side of the shrine room where the idol of deity was placed. Dome-shaped shikhara and Kalash were placed on the top of the Gopuram. Pillared mandapas like arthamandapa, mahamandapa and nandimandapa were also found in some temples.