Question : Select the most appropriate option to fill in the blank.
Very special care should be taken to proportion the sand so as to make a perfectly ______ mixture.
Option 1: envious
Option 2: obvious
Option 3: devious
Option 4: impervious
Correct Answer: impervious
Solution : The fourth option is the correct choice.
Impervious means not allowing fluid to pass through; unable to be affected by. In the context of proportioning sand for a mixture, impervious suggests creating a mixture that is resistant to the penetration or influence of external factors, making it the most appropriate word.
The meanings of the other options are as follows:
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Envious means feeling discontent or resentment towards someone else's possessions, qualities, or luck.
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Obvious means easily perceived or understood; clear.
Devious means showing a skillful use of underhanded tactics to achieve goals.
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