You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.
--------
Question: Category: A DELICATE OPERATION 
Clue: A bypass operation may bypass the carotid or coronary one of these

Answer: artery


Question: Category: CINEMA 
Clue: Vangelis' theme from this 1981 British film took a record 21 weeks on the charts to reach No. 1

Answer: "chariots of fire"


Question: Category: OH, CANADA 
Clue: Canada's first full-scale one of these controversial power plants opened on Lake Huron in 1967

Answer:
a nuclear power plant