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					 Which of the following measurement defines a measurement relative to a font’s x-height?
 
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- pt
 - px
 - ex
 - em
 - None of these
 
 
Correct Option: C
Defines a measurement relative to the height of a font in em spaces. Because an em unit is equivalent to the size of a given font, if you assign a font to 12pt, each em unit would be 12pt, thus 2em would be 24pt.