Chinalco says confident of Rio deal, no plan B

HONG KONG, March 31 (Reuters) - Aluminum Corp of China (Chinalco) is confident of its investment in Rio Tinto (RIO.L) (RIO.AX) getting clearance from Australia's Foreign Investment Review Board, but it has no plan B, company President Xiong Weiping said on Tuesday. "I've been in office more than a month and as far as I know there isn't a plan B, but of course we have a draft plan for the best and worst case scenarios," Xiong told a news conference in Hong Kong.