How many babies are born with low birth weight in the developed countries every year according to WHO? A pill of multivitamins

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问题 How many babies are born with low birth weight in the developed countries every year according to WHO?
A pill of multivitamins may contain all of the following substances EXCEPT

选项 A、all vitamins in the B group.
B、vitamins C and E．
C、much iron and folate.
D、antiviral substances.