'A', the Captain of a steam vessel, suddenly and without any fault or negligence on his part, finds himself in such a position that, before he can stop his vessel, he must inevitably run down a boat 'B', with thirty passengers on board, unless he changes the course of his vessel and faces the risk to run down boat 'C', only with two passengers on board. 'A' altered his course to save passengers in boat 'B' without any intention to run down the boat 'C' and in good faith. In the process of altering this course, he runs down boat 'C' with 2 passengers. In this case, 'A' can be held guilty of which one of the offences given below ?