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]: Onion thrips experience ____ instars.\Question: Choose the right answer from options given a) three b) six c) eight d) four
[EX A]: d

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

[EX Q]: Coral reefs are the centerpiece of ____ sanctuaries.\Question: Choose the right answer from options given a) three b) five c) nine d) two
[EX A]:
a