science help needed

Question

Julie noticed on the campout that Terry’s face had darkened from the sun. She learned that every time we are out in the sun, our bodies make Vitamin D. The Vitamin D made by the body is considered to be natural. But Vitamin D tablets can also be made in a factory. Which statement is true regarding the chemical composition of these two substances? 

The Vitamin D made in our bodies does not work correctly.

The Vitamin D made in a factory contains different elements than what is made in our bodies.

Both Vitamin D’s contain the same elements and in the same arrangements so they work the same.

The Vitamin D made in our bodies is different from that made in a factory.

Answer 1

Both Vitamin D’s contain the same elements and in the same arrangements so they work the same.