Multiple choice

Which is a form of pre-formed vitamin A?

  1. retinol

  2. phylloquinone

  3. alpha tocopherol

  4. beta carotene
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A Correct answer
Explanation

Retinol is the active, preformed shape of vitamin A found in animal-derived foods. Beta-carotene is a provitamin carotenoid that must be converted into vitamin A by the body, while phylloquinone and alpha-tocopherol are vitamins K and E, respectively.

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