Most lipids contain long chains of which two atoms
a. carbon and oxygen
b. water and phosphorous
c. water and carbon
d. carbon and hydrogen

The correct answer is option D. Carbon and hydrogen.

The lipids are the molecules, which are made up of a long chain of hydrocarbons. The hydrocarbons are the compounds, which are mainly made up  of hydrogen and carbon. Lipids are dominated by the hydrocarbons and they also have oxygen atoms present in their structures.

Hence, the structure of the lipids contain a long chain of hydrogen and carbon atoms.

the answer would be   10%

colors do exist. the color of the sky is actually violet; humans percieve the color of the sky as blue.