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B
Bacillus subtilis
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C
Clostridium welchii
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D
Escherichia coli
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Solution
The correct option is ABacillus thuringiensis Cry proteins are a large family of crystalline toxins produced by Bacillus thuringiensis. Bacillus thuringiensis encompasses a group of aerobic, Gram-positive spore-forming bacteria that produce large crystalline inclusions consisting of entomocidal protein toxins. Cry toxins are a major constituent of these inclusions.