The usual way of removing the page doesn't work. I am unable to view the delete option that appears in the page below the move and copy.This is something looking weird in terms usability perspective. First, I am unable to get to the delete option, since it doesn't show up in the entire menu option.
Please suggest a way to resolve this problem.
There is no other way. You don't have permission to delete pages. You need to ask your Confluence Administrator to give you extra permissions or add you to a group that can delete pages.
I don't allow my colleagues to delete pages unless they have put in a request, which is assessed first.