The International Monetary Fund has lowered India's economic growth forecast by 1 per cent to 5-6 per cent for 2012-13.The IMF in its latest World Economic Outlook report said,downgrade reflects both an expectation that current drags on business sentiment and investment will persist and aweaker external environment," the report said.Released in Tokyo ahead of the IMF-World Bank 2012 Annual Meetings, the report said that the growth has weakened in the first half of current year due to deteriorating businesssentiment and stalled investment due to governance issues.The report presented a gloomier picture of the global economy than a few months ago, saying prospects havedeteriorated further and risks increased.The IMF's forecast for global growth was marked down to 3.3 per cent this year and 3.6 per cent for 2013.The multilateral agency said advanced economies are projected to grow by 1.3 per cent this year, compared with 1.6per cent last year and 3 per cent in 2010, with publicspending cutbacks and the still-weak financial system weighingon prospects.