*Question*
Question: where is vitamin d found I found the following answer on Google: Calcidiol is also converted to calcitriol outside of the kidneys for other purposes, such as the proliferation, differentiation and apoptosis of cells; calcitriol also affects neuromuscular function and inflammation. Is that a correct answer? Yes or no.
**Answer**
No

*Question*
Question: how many classes of vitamins I found the following answer on Google: For example, ascorbic acid ( vitamin C ) is a vitamin for humans, but not for most other animals, and biotin and vitamin D are required in the human diet only in certain circumstances. Is that a correct answer? Yes or no.
**Answer**
No

*Question*
Question: How did the pendulum improve upon earlier clocks? I found the following answer on Google: "Simple gravity pendulum" model assumes no friction or air resistance. Is that a correct answer? Yes or no.
**Answer**
No

*Question*
Question: how old were the twin towers when destroyed I found the following answer on Google: At the time of their completion, the original 1 World Trade Center (the North Tower) and 2 World Trade Center (the South Tower), known collectively as the "Twin Towers", were the tallest buildings in the world. Is that a correct answer? Yes or no.
**Answer**
No