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').

Most people have ____ kidneys.\Question: Choose the right answer from options given a) two b) five c) seven d) six
a

Ozone is a naturally occurring molecule containing ____ atoms of oxygen.\Question: Choose the right answer from options given a) three b) five c) nine d) eight
a

Cuttlefish have ____ arms and two tentacles.\Question: Choose the right answer from options given a) zero b) nine c) eight d) one

c