The types of flowers which always produce seed even in the absence of pollincators

The types of flowers which always produce seed even in the absence of pollinators

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 ?

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

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