I have a problem with my blogger site.When in my mobile mode

When I click on the point A the drop down menu appears, but when I tap on point B(see photo) it doesn't and appears but it redirects to a blank page.the photo link is attached

https://drive.google.com/file/d/1cCCO7XthdYpuLoStj-jqgFuc6Ckssubs/view

The Dropdown menu should also appear by clicking the text(JEE)

here is the XML code of my template

https://drive.google.com/open?id=1WTVVltq1ucpOnIRWW_qyw84y6w9VZBeE