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

Answer: b


Question: Alleles segregate independently yielding ____ possible allelic combinations in gametes.\Question: Choose the right answer from options given a) ten b) one c) four d) nine

Answer: c


Question: Birds have a reversed rear toe that opposes the front ____ toes and allows birds to perch.\Question: Choose the right answer from options given a) zero b) ten c) seven d) three

Answer:
d