1) " The age of an infant. "
2) " The age of infant. "
Which one is correct?
The first one is correct, assuming it is used in an appropriate context. ; so, for example, a field on a form could be labelled "Age of infant". ) More context would be helpful.
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The first one is correct, assuming it is used in an appropriate context.
(Articles may be omitted in labels, captions, headlines etc.; so, for example, a field on a form could be labelled "Age of infant". "The age of infant" is a mixed style that seems less likely to be used.)
More context would be helpful.