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]: Most internal parasites are specific to one or ____ species.\Question: Choose the right answer from options given a) seven b) three c) two d) five
[EX A]: c

[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]: Wood ticks require a blood meal from ____ different hosts to complete their development.\Question: Choose the right answer from options given a) two b) six c) no d) three
[EX A]:
d