Assertion: The flower of papaya is called unisexual flower.
Reason: The flower contains stamens only as a sex organ.
(3)
Unisexual flowers are those which can have either stamen or carpels as sex organ. It is not true that it has only stamen in it. It can have only carpel also, so either of these will describe a unisexual flower. Thus, assertion is true but reason is false.