Where are the statements?
I would say A is the correct answer. B and C are definitely wrong, and I think D is talking about genes and not chromosomes.
Answer:
I'm sorry but you should do it on your own because if you don't you won't learn the way you should and plus that is cheating.
There are 4 electrons altogether shared between carbon atoms in a molecule of C2H4, to be more precise there are 2 electron pairs shared between the carbon atoms.
