Question

Which sentence is correct?

One of the most popular pets is tropical fish.
One of the most popular pets are tropical fish.

Answer 1

One of the most popular pets are tropical fish.

Answer 2

The right anser is: One of the most popular pets is tropical fish.

Step-by-step explanation:

The word "one" is in singular. If the sentence was in plural, it should be "Some of the most popular pets are tropical fish."