Is school of girls is correct in collective noun?

"School of girls" is grammatically correct, but it's not a typical use of the collective noun "school."

Here's why:

* "School" usually refers to an institution: We typically say "school" when talking about a place of learning, like "The students are at school."

* "School" can be a collective noun for a group of fish: For example, "A school of fish swam by."

To refer to a group of girls, you have better options:

* A group of girls

* A class of girls

* A team of girls

* A troop of girls

* A bunch of girls

The best choice depends on the specific context and the type of group you're describing.