Girl tried to fish me a compliment today

[Hadrian]

And I didnt knew how to bust her stone as Chase said. It was during interval break at school. We were close and she asked me "Which girls from our class do you think are pretty?" I immediately realized she was fishing for one but I couldn't come up with an asshole answer because it was an general question and I'm still developing my framing response skills. So I decided to answer, mentioning some girls except her ( even though she is pretty) , hoping it would cause some jealousy in her.
Ultimately, what should I have answered in situations less explicit like this? Can you give some examples of responses so I can use in the future?

 

[Raqimus]

It depends did you actually like the girl and think she was cute or something? If i liked her I would of looked at her and checked her out then look away with a smile or something. If i didnt I'd just say wouldn't you like to know? I'd kinda tease her but it really depends alot on the tone. I'm not good, thats what I'd recomend tho I don't bust stones too much

 

[Hadrian]

You actually gave me a nice response- Checking out then smiling. Well, and just thought about other one now. Now, next time a girl asks me that I can answer in two ways

1- (When still building rapport) - Check out and smile
20 (Already able to escalate)- Leaning close, change to flirtier nonverbals, and start giving away subtle traits of her, enough to build intrigue and tension without being too obvious.