Sunlight is the main source of ______.

Correct option is C

Sunlight is the primary natural source of Vitamin D, which is produced when the skin is exposed to ultraviolet (UV) rays from the sun. The body synthesizes Vitamin D when UV rays trigger the production of a form of cholesterol in the skin, which is then converted into Vitamin D.

Key points:

• Vitamin D is essential for the absorption of calcium and phosphate, which are important for maintaining healthy bones and teeth.
• A deficiency in Vitamin D can lead to bone disorders such as rickets in children and osteomalacia in adults.

Additional Information:

• Vitamin D can also be obtained from dietary sources such as fatty fish, fortified dairy products, and egg yolks.
• Apart from sunlight exposure, Vitamin D can be synthesized through supplements or fortified foods if sufficient sunlight exposure is lacking.

Other Options:

• Vitamin A: While Vitamin A is important for vision and immune function, it is primarily obtained from foods like carrots, sweet potatoes, and leafy greens, not sunlight.
• Vitamin B: This group of vitamins, which includes B1 (thiamine), B2 (riboflavin), and others, is mainly obtained from foods such as whole grains, meat, and dairy, rather than sunlight.
• Vitamin C: Vitamin C is primarily found in citrus fruits, berries, and vegetables like bell peppers and broccoli, not from sunlight.