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').

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

Example Input: Carnations grow well in a garden spot that receive ____ to five hours of sunlight per day.\Question: Choose the right answer from options given a) eight b) three c) one d) four
Example Output: d

Example Input: Bears have ____ toes.\Question: Choose the right answer from options given a) five b) no c) eight d) ten
Example Output:
a