what does the below math rebus puzzle mean?

You are an expert on paranormal activity and have been hired to locate a spirit haunting an old resort hotel. Strong signs indicate that the spirit lies behind one of four doors. The inscriptions on each door read as follows:

Door A: It's behind B or C
Door B: Its behind A or D
Door C: It's in here
Door D: It's not in here

Your psychic powers have told you three of the inscriptions are false, and one is true. Behind which door will you find the spirit?

Why Aeroplane windows are round?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

A very interesting trivia question for all.

Why do men's shirts have their buttons on the right side and women's have buttons on the left-hand side?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

I start and end with 500 and carry a 5 in my heart. But I require the first letter and the first number to be complete. I am the name of a King.

Who am I ?

I was speeding and ran through a stop sign, yet two traffic officers who were there do nothing about it.

why?

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

You have a basket containing ten apples. You have ten friends, who each desire an apple. You give each of your friends one apple.
Now all your friends have one apple each, yet there is an apple remaining in the basket.
How?