A knows that B is suffering from enlarged liver, being a doctor, A knows that if he gives a fist blow to B in that region with moderate force, it would result in rupture of B’s liver and is likely to cause his death. Knowing this, A gives B a fist blow which ruptures B’s liver and causes his death. A is

Except in the cases hereinafter excepted, culpable homicide is murder, if the act by which the death is caused is done with the intention of causing death, or— 2ndly.—If it is done with the intention of causing such bodily injury as the offender knows to be likely to cause the death of the person to whom the harm is caused, or— 3rdly.—If it is done with the intention of causing bodily injury to any person and the bodily injury intended to be inflicted is sufficient in the ordinary course of nature to cause death, or— 4thly.—If the person committing the act knows that it is so imminently dangerous that it must, in all probability, cause death, or such bodily injury as is likely to cause death, and commits such act without any excuse for incurring the risk of causing death or such injury as aforesaid.