A sexual assault charge has been dropped against a University of Montana exchange student who struck another student after learning she was transgender. Obioha Onwubiko pleaded guilty last week in Missoula Municipal Court to a misdemeanor assault charge in connection with the April 28 incident outside a dance at the Elks Club. “Obi never denied striking her and had, from the beginning, accepted that responsibility and never attempted to justify his actions under the law,” Onwubiko’s attorney, Craig Shannon, said Thursday. “But as long as the sexual assault charge was hanging out there, he was prepared to fight the entire case.” The sexual assault charge stemmed from Anita Green’s accusation that Onwubiko grabbed her crotch just before he hit her. Onwubiko received a six-month deferred sentence on the assault charge, and must pay $203 in fines and court costs. The deferred sentence means the charge will be erased from his record if he stays out of trouble.