Can a (I) monoceious plant have bisexual flowers (ii) monoeceious plant have unisexual flowers (iii) dioeceious plant have bisexual flowers (iv) dioeceious plant have unisexual flowers?

Dear student,
1) Monoecious plants have bisexual flowers. Monoecious plants are always bisexual.
2) Monoecious plants can have unisexual flowers. Birch family are monoecious with unisexual flower.
4) Diocious plants have unisexual flower. Male plants are separate and female plants are also separate plants.

Regards