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Which one of the following expressions is the simplest form of
#frac{2(a+2b)+a-4b}{4(2b-a)-5b+4a}#
A. #a/b#
B.#2/3#
C.#frac{2a-2b}{2a-b}#
D.#frac{3a-2b}{3b+3a}#