Correct Answer: Vitamin D

Solution : The correct answer is Vitamin D.

Our bodies produce vitamin D when exposed to sunlight. The human skin's epidermal layer is where vitamin D is primarily synthesised when exposed to sunlight. The human body needs vitamin D to absorb calcium and phosphorus, both of which are necessary for strong bones. Since it is produced by the body when exposed to sunlight, Vitamin D is also known as the sunshine hormone.