Question $3(4\mathrm{.}16$ points$)$

Persons who smoke have a documented increased need for

biotin.

folate.

vitamin C$.$

vitamin B$-12.$

Question $4(4\mathrm{.}16$ points$)$

A friend has been complaining of skin issues: redness, inflammation, and soreness. Which of the following would you NOT suspect is contributing to his condition?

Vitamin B$-6$ deficiency

Niacin deficiency

Vitamin B$-12$ deficiency

Biotin deficiency