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: Vaccination typically occurs at ____ to eight weeks of age in kittens.\Question: Choose the right answer from options given a) three b) nine c) six d) no
Example Output: c

Example Input: Teething begins for most babies around ____ to six months.\Question: Choose the right answer from options given a) three b) four c) five d) seven
Example Output: b

Example Input: Lupus strikes ____ women to every man, and can be very difficult to diagnose.\Question: Choose the right answer from options given a) five b) one c) eight d) nine
Example Output:
d