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').

Granite occurs in ____ separate masses.\Question: Choose the right answer from options given a) two b) eight c) nine d) no
a

Collars come in ____ shapes.\Question: Choose the right answer from options given a) six b) two c) four d) zero
b

Twins are a genuine rarity, and only a few births of ____ or more foals have ever been recorded.\Question: Choose the right answer from options given a) one b) seven c) three d) no

c