By Steve Keating RIO DE JANEIRO (Reuters) - Croatia beat Lithuania 90-81 in the final preliminary round game of the Olympic men's basketball tournament on Monday, vaulting from fifth to the top of Group B and avoiding a nightmare quarter-final clash with the unbeaten United States. Instead, Argentina have drawn the short straw and will face the daunting task of taking down a U.S. team riding a 22-game Olympic win streak in their quest for a third straight Olympic gold medal. The other quarter-finals, which will all be played on Wednesday, feature a spicy matchup between Serbia and Croatia, a tip-off between old foes Spain and France and a contest between Australia and Lithuania.
