Unisexual flowers contain
Either stamen or carpel
The correct option is D.
Explanation of the correct option:
Explanation of the incorrect options:
Option A:
Flowers having both stamen and carpel are called as bisexual flower.
Option B:
Flowers containing only male reproductive part (stamen) are called as androgenic flower.
Option C:
Flowers containing only female reproductive part (carpel) are called as gynoecious flower.
Final answer:
Unisexual flowers contain either stamen or carpel.