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]: Batteries consist of ____ electrodes immersed in an electrolyte.\Question: Choose the right answer from options given a) two b) eight c) three d) seven
[EX A]: a

[EX Q]: Female cats have ____ X's in each cell.\Question: Choose the right answer from options given a) five b) two c) one d) ten
[EX A]: b

[EX Q]: Tuataras reproduce very slowly, sometimes taking ____ years to reach sexual maturity.\Question: Choose the right answer from options given a) three b) no c) one d) ten
[EX A]:
d