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satyendra yadav

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· 1 Months ago

plz explain sir

Question:
DIRECTIONS:Some part of the sentences have errors and some are correct. 
Find out which part of a sentence has an error. 
Options:
A) The average age 
B) at which people begin to need eye-glasses
C) vary considerably. 
D) No error 
Solution:
Ans:(c) 

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