(a) An accused may be found guilty of any of the following:
(1) The offense charged;
(2) A lesser included offense;
(3) An attempt to commit the offense charged; and
(4) An attempt to commit a lesser included offense if the attempt is an offense in its own right.
(b) For purposes of this section, "lesser included offense" means:
(1) An offense that is necessarily included in the offense charged; and
(2) Any lesser included offense so designated by rules adopted by the governor or adjutant general; provided that any designation of a lesser included offense shall be reasonably included in the greater offense.