Entries Dropdown

-- HikaShop version -- : 4.4.4
-- Joomla version -- : 3.10.3
-- PHP version -- : 7.4
-- Browser(s) name and version -- : Chrome

Hi.
I have 3 events in my site which I want users register to them with Hikasop's Entries featur.

Is taht possible that I create a dropdown in entry custom fields in which every option dropdown be linked to different product ? so that user can select which event he/she wants ro register via dropdown field ?

I'm creatiing a website for a Flower company.
they have different classes for flower art.
supose class A and class B and class C

I want to create a page for registering ro class.
I want users to fill theur name, their email and their address.

And I I need a dropdown with options :
class A
class B
class C

for user to select which class he/she wants to register