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Some programmers are careful about using this within member functions to make clear the distinction between Parameter variabl

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Answer : Option 4 (Data members and other variables)

Explanation : this is a keyword whcih is used to refer a current object.means it is a reference variables whcih refers to current object.Object means it contains data members .And to make difference between data members and other variables even though they both variables have same names this keyword will make a clear distinction between data members and other variables

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