instruction:
In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
question:
Optical isomers differ in the arrangement of _ groups around a chiral carbon.
answer:
four


question:
Tourism is among the _ largest industries in each of the western states.
answer:
three


question:
Sweet corn accounts for about _ per cent of total corn production in Ontario.
answer:

five