Which of the following compounds serves as the major precursor for the body's synthesis of vitamin D?

Name: Which of the following compounds serves as the major precursor for the body's synthesis of vitamin D?
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Question

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Cholesterol is the major precursor for the synthesis of vitamin D in the body. It is converted into 7-dehydrocholesterol in the skin, which is then transformed into vitamin D3 upon exposure to UVB radiation from sunlight.

Which of the Following Compounds Serves as the Major Precursor