Which one of the following ollowing is true -

Ananthanarayan & Panicker's Textbook of Microbiology 9th edition pg no:39-40 Agar has no nutritive value it is formed from seaweeds.it is universally used to prepare solid media Chocolate agar is an eg of enriched media they are used to grow bacteria which are more extracting in their nutritional needs Enrichment media: some substances which added to a medium may inhibit the growth of the unwanted bacteria and absolutely increasing the number of wanted bacteria in the liquid media