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]: Food waste is transformed into soil-like humus in ____ to seven days.\Question: Choose the right answer from options given a) ten b) five c) zero d) three
[EX A]: d

[EX Q]: Vaccinated newborns have protection for at least ____ years.\Question: Choose the right answer from options given a) four b) five c) two d) no
[EX A]: b

[EX Q]: Dicots have ____ seed leaves.\Question: Choose the right answer from options given a) two b) six c) zero d) four
[EX A]:
a