Non-viable seeds are produced by

Cleistogamous flowers are found in ....

Given below are two statements: One is labelled as Assertion $(A)$ and the other is labelled as Reason $(R)$.
Assertion $(A)$: Both wind and water pollinated flowers are not very colourful and do not produce nectar.
Reason $(R)$: The flowers produce an enormous amount of pollen grains in wind and water pollinated flowers.
In the light of the above statements,choose the correct answer from the options given below:

Which one of the following may require pollinators,but is genetically similar to autogamy?

Rose plants produce large,attractive bisexual flowers but they seldom produce fruits. On the other hand,a tomato plant produces plenty of fruits though they have small flowers. Analyze the reasons for the failure of fruit formation in rose.

Identify '$P$','$Q$','$R$','$S$',and '$T$' in the given figure.