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M: +2.00/-0.50

Which one of the following fuels creates the least pollution?

U.P.P.C.S. (Pre) 2017 U.P. Lower Sub. (Pre) 2015 U.P. Lower Sub. (Pre) 2013 U.P.U.D.A./L.D.A. (Spl.) (Pre) 2010

[Energy Sources & Pollution]
A
B
C
D

EXPLANATION

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