Given an trivia question precisely answer the question with a word/phrase/name. External resources such as Wikipedia could be used to obtain the facts.

What word is used in mathematics to mean if and only if?
if and only if

New Zealander Michael Campbell is a leading player in which sport?
golf

In which play by George Bernard Shaw is the daughter of 'Lady Britomart Undershaft' an Officer of the Salvation Army?

major barbara