Gingivitis is inflammation of the what?

More Questions:

What American company had a thirty-foot inflatable gorilla atop its Rhode Island offices for decades?

In 1992, which US state began offering tourist info at 1-800-33-GUMBO?

What two pins are left standing in bowling's hardest split to pick up?

Heroin is the brand name of morphine once marketed by which pharmaceutical company?

Which character killed Cock Robin?

Where is the Tennis Hall of Fame located?

In the first Punic War, Rome and Carthage fought over possession of what Mediterranean island?

Budapest is the capital of which European country?

What year did actor W. C. Fields die?

In the TV show "The Simpsons', what is the name of the comic book store?

What was the first US city to have a subway system?

Who was the father of Cleopatra's twins?

What is the United Kingdom European Union membership referendum of 2016, more widely known as?

Central African Republic shares its eastern border with which country?

Which major river is adjacent to Memphis, Egypt?