What vitamin's principal form is ascorbic acid?

More Questions:

The Chicago Bulls take the court to "Sirius', an instrumental track by what prog-rock band?

Which Japanese city is synonymous with efforts to stem global warming?

What war provides the background for the book "Gone with the Wind"?

Which year was the first book in the Harry Potter series published?

Valentine’s Day is also known as the "Feast of…" what?

South Africa's Robben Island takes its name from which creatures?

In relation to location, what does the abbreviation GPS stand for?

What Stanley Kubrick movie featured gangs of young punks loose in a future Britain?

What actor played Bill the Butcher in the 2002 movie "Gangs of New York"?

What actress won an Oscar for portraying a real-life person named Brandon Teena?

Which British Sailor and Explorer was killed by Hawaiian natives in 1779?

On what date did America become an independent nation?

What nation was led by Rameses the Great?

Ferdinand Marcos and Corazon Aquino have both been Presidents of which country?

Wayne Brazel shot and killed what Western figure?