Growth in production (in percent) of which one of the following core industries in India during the period 2015-2016 was negative?

Coal production (weight: 4.38 %) increased by 12.0 % in June 2016 over June 2015. Its cumulative index during April to June 2016-17 increased by 5.4% over corresponding period of previous year.Natural Gas

The Natural Gas production(weight: 1.71 %) decreased by 4.5 % in June 2016 over June 2015. Its cumulative index during April to June 2016-17 declined by 6.1 % over the corresponding period of previous year.Refinery Products (93% of Crude Throughput)

Petroleum Refinery production(weight: 5.94%) increased by 3.5 % in June 2016 over June 2015. Its cumulative index during April to June 2016-17 increased by 7.1 % over the corresponding period of previous year.Fertilizers

Fertilizer production(weight: 1.25%)increased by 9.8 % in June 2016 over June 2015. Its cumulative index during April to June 2016-17 increased by 11.0 % over the corresponding period of previous year.