Sentence Correction

pls discuss .
OA : B

WOW!!! Can u pls let me know the source of this question.

Let me attempt to answer this one..
On first look, "fish" and "are" looked kind of strange. In my mind, I expected to see "fishes" but I think the fish is correct coz plural of fish is fish.

Here C is the answer.
Fish's eyes needs to be compared with mammal's eyes.

here are from test sets . most questions seem to be a fine rendition of the official questions .
I dont think there is grave mistake in the qestions . Lets see ..

just one small advice..
whatever source you are using!!
is sucked up!!

their is wrong....it cannot refer to fish....
https://crofsblogs.typepad.com/english/2 ... ishes.html
eyes are plural so...it should be those of mammals. ( no option available so choose the lesser evil )