A deficiency of which vitamin can lead to night blindness?

More Questions:

What single initial is used for the real-life director of Britain's M16?

A Kamikaze cocktail contains vodka, triple sec and what?

When did boxer John L. Sullivan die?

What sauce is used in traditional eggs Benedict?

Which is larger, a baseball or a softball?

What did Fender name the follow up to their "Telecaster" guitar?

Who wrote about Willie Wonka and the Chocolate Factory?

What is Dorothy;s dog named in the classic novel "The Wonderful Wizard of Oz"?

What body of water does the Danube River flow into?

How many moons does Mars have?

What affliction of the sight is also known as Daltonism?

What historical woman has been portrayed on stage and screen by Faye Dunaway, Elaine Paige, and Madonna?

What was Walt Disney's first feature-length animated film?

Who developed the first modern set of headphones?

What did Frosty the Snow man have for a nose?