The 23-year-old from Kerala made a brave attempt to qualifyfor the finals from heat 2 but the hot pace set by the other leading runnerspulled her to her best show of the season without gaining her a berth in thefinals on August 11.
Luka timed 1 minute, 59.69 seconds, 0.52 seconds off herpersonal best and a vast improvement on her show in the first round heats, asshe ended up sixth in the heat and got eliminated.
Luka qualified for the women's semis yesterday afterfinishing third in heat two, clocking 2:01.75.
Earlier, high jumper Sahana Kumari and wrestler Geeta Phogatalso made their departure from the Games without making any serious attempt toclimb the medal podium as India drew a blank on Day 13 of the Games.
The country's male boxers also ended their medallesscampaign after last man in the fray, Devendro Singh (49kg), lost 18-23 in thequarterfinals despite putting up a gallant fight last night against Ireland 'sPaddy Barnes in a contest marred by debatable refereeing to further dent thedwindling medal hopes.
Sahana performed well below her personal best and wasknocked out of the women's high jump after clearing 1.80m and finishing atjoint 15th in the Group B of the qualifying competition at the Olympic Stadium.
The 30-year-old athlete sailed over the bar at the firstattempt with a 1.80m leap but failed in her endeavour to clear the 1.85m markin all her three attempts and got eliminated.
Grappler Geeta, gold medal winner in the 2010 DelhiCommonwealth Games, was up against a formidable rival -- 2004 Athens silvermedalist and 2008 bronze winner Tonya Lynn Verbeek of Canada -- and foughtbravely before losing the 55kg bout in the last minute.
She got another chance to at least gain the bronze whenVerbeek stormed into the finals, but was overwhelmed 3-0 by Ukraine'sTurkmenistan-born rival Tetyana Lazareva in repechage round two and made herexit from the Games.
