For 1 and 2 where is the testimony this was the cause of death.
The defense medical expert witness.
Remember that the defense doesn't have to prove that one of these was the case of death. They just have to show that the prosecution has not brought proof beyond a reasonable doubt that these were not the cause of death.
3 - did the defense raise this non-sense?
Again n, it was the prosecutions witness that presented this as the cause of death.