42. Pay attention to the formula of aloe vera extract lipbalm (Aloe vera.L): Glycerin 5% Cera flava 10% Nipagin 0.18% Lanolin 15% Oleum cacao ad 100% Aloe vera extract 10% The active ingredient in the formula is .... A. glycerin B. oleum cacao C. aloe vera extract D. cera flava

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