((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.
((4)) An attempt to commit a lesser included offense, if the attempt is an offense in its own right.
((b)) ** .—** In this section (article), the term “lesser included offense” means—
((1)) an offense that is necessarily included in the offense charged; and
((2)) any lesser included offense so designated by regulation prescribed by the President.
((c)) ** .—** Any designation of a lesser included offense in a regulation referred to in subsection (b) shall be reasonably included in the greater offense.