Which one of the following is a wrong matching of a microbe and its industrial product, while the remaining three are correct?

(A)Yeast – statins
(B)Acetobacter aceti – acetic acid
(C)Clostridium butylicum – lactic acid
(D)Aspergillus niger – citric acid

The NCERT line that answers it

Verbatim line

Examples of acid producers are *Aspergillus niger* (a fungus) of citric acid, *Acetobacter aceti* (a bacterium) of acetic acid; *Clostridium butylicum* (a bacterium) of butyric acid and *Lactobacillus* (a bacterium) of lactic acid.

Chapter: Microbes in Human Welfare
Section: 8.2.3 Chemicals, Enzymes and other Bioactive Molecules
Page: 4
Words matched: 33 of 33

The answer appears as a continuous sentence in NCERT. This is that sentence.

How this line gives the answer

0, emb=1.0, combined=1.0). Verified: high — The span explicitly states that Clostridium butylicum produces butyric acid, not lactic acid, which directly contradicts option C's claim that it produces lactic acid, thereby proving option C is the wrong matching.

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Question text is reproduced from the published NEET 2011 paper for study and commentary. NCERT text is quoted, not redistributed; textbooks remain at ncert.nic.in. Our mapping method, including its measured error rates, is published at /methodology.