Anthem Inc. said it would petition the Supreme Court to review the antitrust rulings blocking its acquisition of Cigna Corp., a long-shot bid to revive a $48 billion deal amid litigation between the two companies. A federal appeals court last month declined to allow the acquisition, affirming a trial judge’s earlier ruling that blocked the deal. Two judges on the three-judge panel of the U.S. Court of Appeals for the District of Columbia Circuit rejected Anthem’s argument that the trial court had failed to sufficiently weigh the company’s claim that billions of dollars in cost savings would flow from the merger.