Answer: Option D
Answer: (d)
The National Sample Survey Office(NSSO) in India is a unique setup to carry out surveys on socioeconomic, demographic, agricultural and industrial subjects for collecting data from households and from enterprises located in villages and in the towns.
The unregistered manufacturing sub-sector, a complement set to the registered manufacturing sub-sector, covers all the residual units which are not covered under the registered manufacturing sector.
Thus, the unregistered manufacturing sector covers all the manufacturing, processing, repair & maintenance services units employing less than 10 workers and using power or less than 20 workers and not using power. The data on the unorganised sector is collected through periodic surveys by the NSSO.