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').

Poisons come in ____ different forms .\Question: Choose the right answer from options given a) four b) no c) five d) ten
a

Springtails reproduce quickly usually within three to ____ weeks.\Question: Choose the right answer from options given a) five b) six c) nine d) three
a

Most people see the world through ____ types of visual-receptor cells.\Question: Choose the right answer from options given a) no b) five c) four d) seven

c