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Abhyudaya Shriyam from DSE, Hyderabad
Subject :NSO    Class : Class 5

Starting from the first letter strike out every alternate letter and select the option that gives the method of water purification in which alum is involved.

ACBPOKIDLYIXNNGP
BZOISSMKOQSRIDSW
CMSYEDDKICMNEPNOTLAVTDIBOCNE
DIFMINLLTIRKADTPITOWNR


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