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]: Pupae usually transform into adults ____ to three days later.\Question: Choose the right answer from options given a) one b) two c) no d) eight
[EX A]: b

[EX Q]: Pelicans use ____ different ways to feed.\Question: Choose the right answer from options given a) no b) nine c) one d) two
[EX A]: d

[EX Q]: Primitive crinoids have ____ circlets.\Question: Choose the right answer from options given a) three b) four c) six d) nine
[EX A]:
b