Answer:
The correct option is A. It is an example of convergent evolution.
Step-by-step explanation:
Convergent evolution can be described as a kind of evolution in which organisms have structures that perform a common function but they do not have the same evolutionary origin
In the above mentioned example, the phenomenon of suction feeding is common to both fishes and frogs. Both these organisms do not have a common origin. Hence, it is an example of convergent evolution.