New Delhi, July 22 -- The output of eight core infrastructure sectors, which account for two-fifths of India's industrial output, expanded 1.7% annually in June, its quickest in three months, according to provisional data released on Monday by the commerce ministry. This growth stood at 1.2% in May, revised from 0.7% reported last month, and 5% in June last year. The Index of Eight Core Industries measures the combined and individual output of coal, crude oil, natural gas, refinery products, fertilizers, steel, cement and electricity. Only three of the eight core industries-refinery products, steel and cement-reported a sequential rise in production during June, repeating a similar trend from May. Core sector output contributes 40.27% to th...