Given a sentence with a missing word, pick the answer option that best fills out the missing word in the sentence. Indicate each answer with its index ('a', 'b', 'c', 'd').
--------
Question: Oranges signify good health, and the number ____ sounds like the word for prosperity.\Question: Choose the right answer from options given a) eight b) ten c) seven d) five

Answer: a


Question: Fluorescent lamps are roughly ____ times more intense than ordinary lightbulbs.\Question: Choose the right answer from options given a) six b) one c) three d) eight

Answer: c


Question: Fire occurs any time ____ elements are present - fuel, heat, oxygen and the chemical chain reaction.\Question: Choose the right answer from options given a) one b) seven c) two d) four

Answer:
d