The gynoecium consists of many free pistils in flowers of
Aloe
Tomato
Papaver
Michelia
If more than one carpel is present in gynoecium this condition is called as polycarpellary. If all the carpels in gynoecium are free, then this condition is called as apocarpous. For example, Michelia.
So, the correct answer is 'Michelia'