NAGPUR, Feb 11: India thrashed Australia by an innings and 132 runs inside three days in the opening Test to take a 1-0 lead in the four-match series here on Saturday.Off-spinner Ravichandran Ashwin (5/37) returned with a five wicket haul as India shot off Australia for 91 in 32.3 overs in their second innings just before tea. Australia conceded a massive first innings lead of 223.