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]: All loci have ____ or two alleles.\Question: Choose the right answer from options given a) no b) six c) four d) one
[A]: d


[Q]: Calves can browse and follow their mother at three weeks old and are weaned at ____ months.\Question: Choose the right answer from options given a) five b) seven c) four d) three
[A]: a


[Q]: Trees begin to bear five to ____ years after planting the root shoot.\Question: Choose the right answer from options given a) no b) three c) eight d) seven
[A]:
d