Most venomous/toxic Naja (cobra) species

[millertime89]

I'm out of my element in this discussion. However I do have a question. The lower LD50 the more toxic correct?
One thing I can contribute is that here is going to be some variation between studies due to every animal producing their own slightly different concoction of venom. So perhaps its possible that animals of the same species from one collection or variation would have different LD50 levels from counterparts collected or raised elsewhere?