New Delhi: April 24: On the first day of the 1st Indian Grand Prix, Odisha’s Shrabani Nanda won gold with a timing of 11.23 secs whereas Amiya Mallik became winner in the men’s 100 metre race with a timing of 10.09 secs. A number of well-known athletes are participating in the event to clinch qualification berths for the Rio Olympic Games which will be held in Rio de Janeiro in Brazil from August 5 to 21.