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').

[EX Q]: Chlorine is manufactured in ____ ways.\Question: Choose the right answer from options given a) four b) two c) nine d) seven
[EX A]: b

[EX Q]: Embryos develop and hatch in about four weeks, then spend four to ____ months in the tadpole stage.\Question: Choose the right answer from options given a) five b) nine c) eight d) two
[EX A]: a

[EX Q]: Stroke affects four out of ____ families and is the third leading cause of death.\Question: Choose the right answer from options given a) six b) nine c) five d) zero
[EX A]:
c