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Which of the following is not used as a biopesticide?
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- Trichoderma harzianum
- Nuclear Polyhedrosis Virus (NPV)
- Xanthomonas campestris
- Bacillus thuringiensis
Correct Option: C
Xanthomonas campestris is not used as a biopesticide. Xanthomonas campestris is a plant pathogen that causes black rot in cotton plants.