1 robots.txt disallow addition for a "search app urls"

i’ve got a “product search app” that i use on my site which uses it’s own “page” to display the search results.

Disallow: /search (this is the default robots disallow for the default shopify site search)

my “search app” urls all start like this: /pages/product-result?bla-bla-bla

i want to disallow all of those product-result pages.

i definitely don’t want to disallow other urls like /pages/about (about us content page)

how do these differ and which one is right?

Disallow: /pages/product-result

Disallow: /pages/product-result/

Disallow: /pages/product-result/*