Explain with examples:
(a) Various sources of demographic data in India
(b) Types of bioassays
(c) LD50 and ED50

(a) Various sources of demographic data in India:

Demographic data refers to the statistical data that provides information about the characteristics of a human population, such as its size, distribution, age structure, and other important features. In India, there are various sources of demographic data, including:

1. Census: The Census of India is conducted once every 10 years and provides detailed information on the size, distribution, and demographic characteristics of the Indian population.

2. National Sample Survey: The National Sample Survey is conducted periodically to gather information on various socio-economic indicators such as education, health, employment, and income.

3. Vital registration: Vital registration systems are established to register births, deaths, and other vital events, and to provide data on fertility, mortality, and population growth.

4. Health and Family Welfare Statistics: The Ministry of Health and Family Welfare collects ________ _____ ___ ____ ___ __________ _____ ____ _____ ______ ________.
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