Indian economy is likely to grow at 6.3 per cent next year largely due to favourable base effect, while inflation is expected to drop to a comfortable 5.4 per cent level in FY14, UK-based bank RBS said on Friday. “Growth should accelerate to 6.3 per cent (in 2013) from 4.8 per cent this year (2012) due to favourable base effect, particularly in the industrial sector," RBS Research said in a report.It said inflation would trend down next year on the back of weak growth and relatively stable commodity prices.