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').

[EX Q]: Wind is renewable, and produces ____ emissions or by-products.\Question: Choose the right answer from options given a) five b) nine c) zero d) no
[EX A]: d

[EX Q]: Most endocrinologists see patients every ____ months throughout the pregnancy.\Question: Choose the right answer from options given a) six b) two c) zero d) three
[EX A]: b

[EX Q]: Plants have many white flowers with ____ petals, giving the plant a white, flat-topped appearance.\Question: Choose the right answer from options given a) five b) three c) one d) four
[EX A]:
d