The diagrams below show the samples of sticky tapes that were left wit – McqOptions

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1.	The diagrams below show the samples of sticky tapes that were left with their sticky surfaces exposed to air at different locations X, Y and Z in a school. From the amount of dust stuck on the sticky surfaces, select the area which has the maximum level of air pollution.
A.	X
B.	Y
C.	Z
D.	Cannot be determined
Answer» C. Z

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