_Which of the following is not a source of ozone emission in the atmos – McqOptions

MCQOPTIONS

1.	_Which of the following is not a source of ozone emission in the atmosphere?$?
A.	Refrigerators
B.	Xerox machines
C.	Dermatological photo-therapy equipments
D.	High voltage electrical equipments
Answer» B. Xerox machines

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