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').

Microwave ovens emit ____ kinds of radiation.\Question: Choose the right answer from options given a) six b) two c) four d) eight
b

Scorpions can live for ____ to seven years.\Question: Choose the right answer from options given a) one b) six c) five d) three
d

House centipedes live anywhere from ____ to seven years, depending on the environment.\Question: Choose the right answer from options given a) three b) five c) ten d) one

a