6 Explanation: there are 6 electrons shared to make propyne
letter A is the correct answer i think.
One electron is shared between ethane, H3-C-C-H3
option 1, 6 electrons Explanation: Ethyne is a an unsaturated hydrocarbon called alkyne and has triple bond between two carbon atoms of Ethyne. And we know that each bond is comprised of two electrons. Hence 3 X 2= 6 electrons are there between two carbon atoms.