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Which one of the following is a correct statement?

A) 'Bt' in 'Bt-cotton' indicates that it is a genetically modified organism produced through biotechnology.

B) Somatic hybridization involves fusion of two complete plant cells carrying desired genes.

C) The anticoagulant hirudin is being produced from transgenic Brassica napus seeds.

D) 'Flavr Savr' variety of tomato has enhanced the production of ethylene which improves its taste.