Expand accordion based on form selection


When users register to our website by filling out a form, they can select 1 of 10 cities as their favourite. After the registration, they are forwarded to a page with an accordion with one tab per city. We would like to automatically expand the favourite city tab based on the prior selection.
For example: if the user selected city A as their favourite, the accordion tab with city A should be expanded. if a user selects city B, the accordion tab with city B should be expanded.

Any ideas on how this could be achieved? Thanks for your input!