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Doctors Medicines MCQs Q&A

In the following question some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If a sentence is free from error,  select 'No error'.  However, dermatologists are (1)/ skeptical by customized shampoos (2)/ being holy grail products. (3)/ No error (4)

In the following question some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If a sentence is free from error,  select 'No error'.  However, dermatologists are (1)/ skeptical by customized shampoos (2)/ being holy grail products. (3)/ No error (4) Correct Answer 2

The error lies in part 2 of the sentence, as the preposition used 'by' is one which indicates a source, whereas to convey the intended meaning of the sentence the correct preposition will be 'of' which expresses the relationship between the subject and the verb.
Therefore, it must be read as, "...skeptical of customised shampoos...".

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