Direction: In the following questions, some parts of the sentences have errors and some are correct. Find out which part of a sentence has an error. The number of that part is the answer. If a sentence is free from error, your answer is No error.
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					 One should have their teeth checked every six months.
 
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- their teeth checked
 - every six months.
 - No error
 - One should have
 
 
Correct Option: A
Possessive of one is one’s. Hence, one’s teeth checked  is the right usage.