Iso-revenue line is a:

Match the method of waste disposal in Column I with the description from Column II.

Column I	Column II
1. Biogas	A. Conserves humus and enriches the soil
2. Vermiculture	B. Produces methane and manure
3. Incineration	C. Garbage and sludge
4. Composting	D. Soiled cotton

Options:

In the question below is given a statement followed by two options numbered 1 and 2. Based on this choose the correct option. Statement: Surveys are among the most popular methods of primary market research. Option 1: Market research surveys are a type of survey used to gather information about a particular market. Option 2: This type of survey is often used by businesses to understand customer needs and preferences, track market trends and identify potential areas for growth.

When every member of a population is put into some order and we choose an arbitrary starting point and select every nth member to be in the sample it is called:

As per the Legal Metrology Act, weights and measures, the base unit for mass is: