Which of the following is not contained in the genetically modified maize？A．Beta carotene.
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Which of the following is not contained in the genetically modified maize？
A．Beta carotene.
B．Precursors of vitamin B.
C．Precursors of vitamin C.
D．Folic acid.
请帮忙给出正确答案和分析，谢谢！
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正确答案：B
新闻中提到，新的转基因玉米包含betacaroteneandprecursorsofvitaminCandfolicacid，而并没有PrecursorsofvitaminB。所以答案为[B]。