Assured seed set is possible even in absence of pollinators when flower is

Assured seed set even in absence of pollinators occurs in

Assured seed set even in absence of pollinators occurs in

The flowers of all these plants show assured seed- set even in the absence of pollinators, except in

The flowers of all these plants show assured seed- set even in the absence of pollinators, except in

Which of the following flowers produce assured seed set even in the absence of pollinators ?

Which of the following flowers produce assured seed set even in the absence of pollinators ?

How is it possible in Oxalis and Viola plants to produce assured seed sets even in the absence of pollinators?