Question

which of the following materials could have been found in the giant cloud that form the solar system? A hydrogen and helium B hydrogen and oxygen C carbon dioxide and oxygen or D liquid and solid water

Answer 1

this is what answers.com says

More or less the same materials that are in the Solar System today - except that our Sun must already have converted a significant amount of hydrogen-1 to helium-4 in the meantime.
So, the original materials must have been: mainly hydrogen-1, less hydrogen-2 (deuterium) and helium-4, and only fairly small amounts of the so-called "metals", i.e., any heavier elements.