Find the synonym of the underlined word. The most frequently employed technique for the purification of solid substances is crystallization.
A
Used
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B
Enjoined
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C
Belaboured
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D
Added
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E
Fused
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Solution
The correct option is A Used
'Employ' means to make use of.
"the methods they have employed to collect the data"
In this sentence, "The most frequently employed technique for the purification of solid substances is crystallization, 'employed' means to be used or utilized. Hence, option A is correct and the others are not because they do not provide the appropriate information.