Question

gabes elderly neighbor told him that when he was growing up, the milkman would deliver glass bottles of milk to his familys doorstep. he wonders why milk is not available in glass bottles anymore. gabe explains to him that light destroys certain water - soluble vitamins in milk and milk is now stored in opaque containers to protect ______ from destruction.
multiple choice
riboflavin
vitamin b - 12
niacin
thiamin

Explanation:

Riboflavin (vitamin B2) is a water - soluble vitamin that is sensitive to light. Vitamin B12 is relatively stable in normal storage conditions and not as light - sensitive as riboflavin. Niacin (vitamin B3) is also more stable to light compared to riboflavin. Thiamin (vitamin B1) is more heat - sensitive rather than light - sensitive in the context of milk storage. Since the question is about a water - soluble vitamin in milk that is destroyed by light and protected by opaque containers, riboflavin fits the description.

Answer:

riboflavin