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]: Notebooks are laptop computers that weigh between five and ____ pounds.\Question: Choose the right answer from options given a) ten b) seven c) nine d) one
[EX A]: b

[EX Q]: Ammonia is among the ____ most abundantly produced chemicals in the world.\Question: Choose the right answer from options given a) five b) zero c) no d) eight
[EX A]: a

[EX Q]: Smokeless tobacco is used in ____ common forms.\Question: Choose the right answer from options given a) one b) two c) seven d) six
[EX A]:
b