Welcome back to the community, @nazmul111631! Maybe this post discussed previously should help you solve your issue:
Besides we also have a support article to explain how a cascading select question works which you should be able to follow it here.
Welcome back to the community, @nazmul111631! Maybe this post discussed previously should help you solve your issue:
Besides we also have a support article to explain how a cascading select question works which you should be able to follow it here.