In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

[EX Q]: Porcine insulin has _ different amino acid and bovine insulin has three different amino acids.
[EX A]: one

[EX Q]: Comets are a bit like giant dirty ice-balls with diameters between _ and fifty kilometres.
[EX A]: five

[EX Q]: Most individuals regain consciousness within _ to four hours.
[EX A]:
two