Cascading question not appearing on preview

I have done the formatting on the xls form and copy-pasted it on the formbuilder but on preview, it is not showing. I wish to know what the error is. please help me
Book_cascade.xlsx (20.9 KB)

@bhoomikaramesh, this post discussed previously should help you solve your issue:

You should be able to learn more about cascading select questions through this support article Adding Cascading Select Questions.