What are the chemical properties of carbon?

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.

Which of the following represents the ester functional group? a. -coo- b. -cho c. -cooh d. c=o

Afusion reaction takes place between carbon and another element. neutrons are released, and a different element is formed. the different element is a) lighter than helium.b)heavier than helium.c)the same weight as helium.d)dependent on the element that reacted with carbon.