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').

[Q]: Ostriches have ____ stomachs.\Question: Choose the right answer from options given a) four b) nine c) eight d) three
[A]: d


[Q]: Sexual reproduction is varied in ____ ways.\Question: Choose the right answer from options given a) seven b) two c) five d) three
[A]: d


[Q]: Death usually occurs by five to ____ years of life due to pneumonia or other infections.\Question: Choose the right answer from options given a) five b) eight c) seven d) one
[A]:
b