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Which among the following methods cannot be used for the manufacture of ethanol?

(a) From fermentation of molasses

(b) From lignocelluloses biomass

(c) Catalytic hydrogenation of ethylene

(d) From microorganisms

I have been asked this question in final exam.

I'm obligated to ask this question of C2 Compounds topic in division Synthetic Organic Chemical Industries of Chemical Technology

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The correct answer is (d) From microorganisms

For explanation: Ethanol cannot be derived from microorganisms. The most widely used method for the manufacture of ethanol is from fermentation of molasses.

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