Give Correct Response

Give correct response. In the following cases the defence of accident may successfully be claimed :

A) A was driving a pair of horses without reins. B was walking on the road and was intoxicated. A called out to him twice to get out of the way but since the speed of the horses was high B was run over and killed.
B) A big party consisting of about 100 men went out for shooting pigs. A boar rushed towards the accused who fired at her, but he missed the boar and shot struck the leg of a member of the party.
C) A trespassed into B's house in his absence and no return B demanded A to leave but A refused to do so. This led to an altercation which excited B who gave him a kick causing injury resulting in death.
D) A takes up a gun, not knowing whether it is loaded or not, posits it in sport at B and pulls the trigger. B is shot dead.