Who was the first to try vaccination (NOT VACCINE BUT THE SIMILAR METHOD)

Traditional Indian and Chinese medicinal

systems sometimes deliberately rubbed the

skin crusts from smallpox victims into the

the skin of healthy people. They thus hoped to

induce a mild form of smallpox that would

create resistance against the disease.

c. ribose, uracil, and a phosphate group

Explanation:

RNA has uracil instead of thymine and ribose instead of deoxyribose