F-Block?

I was watching some zone curiously since some time. One day in 2017, read something like, "Modi G, give her all money in one installment and let her go."

My curiosity increased a bit more. Who is this person on F-Block?

Next day, while I was in my office room, some student came and asked me, "Ma'am where is "S Pho..... ma'am room"?

S Pho..... ma'am?

Music teacher.

Did not you read the name of this department before entering this building? It's Biotechnology.

Oh! Sorry ma'am. We asked someone at the entry gate and had been informed to check at second floor.

This is first floor, not second. 

Oh! Again sorry ma'am.

Such things had become normal at that official place.

Since then I noticed so many interesting changes on so-many other spaces on F-Block. This side F-Block, that side F-Block like some clogs. 

Now a days blah, blah zones have gone on blocked-mode and blah, blah opened-mode. I wonder at times, what makes these F-zone spaces blocked or opened zone? In case, someone can shed some light :)