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 toddlers find it hard to sit still for more than a few seconds, let alone ____ minutes.\Question: Choose the right answer from options given a) no b) three c) four d) zero
b

Birds have ____ eyes.\Question: Choose the right answer from options given a) eight b) five c) nine d) two
d

Mountain sheep have ____ sharp teeth at the front of the mouth.\Question: Choose the right answer from options given a) eight b) five c) four d) no

a