Goitre is mostly caused by what deficiency?

More Questions:

What is the American term for the rope maneuver called "abseiling" in Europe?

What country had, at one time, a female "Santa" called La Befena?

From what language did English borrow the word "honcho"?

What spirit is the comic book nemesis of Casper, the Friendly Ghost?

Who is the author of the book "Spark Joy"?

Who is the son of Sycorax in Shakespeare's "The Tempest"?

In Shakespeare's "The Tempest', what are the names of the three spirits?

Lake Winnipesaukee is the largest lake in which US state?

In the 1988 movie "Die Hard', what does John McClane leave in the limo?

Who played the male lead role in the 1983 movie "Staying Alive"?

Who succeeded James Garfield as US President?

Who did Dwight Eisenhower defeat in two US Presidential elections?

What year was the Jeddah Flagpole constructed in Saudi Arabia, becoming the tallest flagpole in the world?

Who was the Roman god of sleep?

The "Buffalo River State Park" is located in which US state?