_Which one of the following is the right way to call a class constant, given that the class is mathFunction?$?

_Which one of the following is the right way to call a class constant,

1.	_Which one of the following is the right way to call a class constant, given that the class is mathFunction?$?
A.	echo PI;
B.	echo mathFunction->PI;
C.	echo mathFunction::PI;
D.	echo mathFunction=PI;
Answer» D. echo mathFunction=PI;

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_Which one of the following is the right way to call a class constant, given that the class is mathFunction?$?

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