Infrastructure is often called as the lifeline of the economy of a nation. It comprises of a well established and well knit network of power, telecom, ports, airports, roads, civil aviation, railways and road transport in a country. Countries need adequate infrastructure so that various economic activities in an economy are executed efficiently, smoothly and above all in time. The deficiencies in the of infrastructural needs of a nation cannot be made up through imports rather the best approach is that it must be created within the domestic economy to put it on through the higher growth trajectory. However,building of infrastructure requires large and lumpy investment and has a relatively long gestation period. Due to this fact, infrastructural facilities are either built or run by the government and public sector enterprises and if private sector is permitted to make investment and run infrastructural projects, they must be regulated in order to ensure quality infrastructure to one and all in the society. Identify the main category of infrastructure mentioned in the above paragraph and explain.