Growth in the country's eight core industries rose to a four-month high of 6.3 per cent in October this year, on the back of better output in coal, refinery products, and electricity. The eight core industries had shrunk by 0.1 per cent in October last year, and grown by 1.9 per cent in September this year.Coal production rose 16.2 percent, refinery products output rose 4.2 percent, and electricity generation increased 13.2 per cent in October, according to data released by the Commerce and Industry Ministry. Crude oil output expanded 1 percent, and steel production rose 2.3 per cent in October. Between April and October 2014, the eight core sectors grew by 4.3 percent, against 4.2 per cent growth in the same period last year.