difference between oligopoly , prefect , monopoly, monopolistic competition?

The difference between oligopoly, perfect competition. monopoly and monopolistic competition is already given in our study material. Follow the given link to view the same.

https://www.meritnation.com/cbse/class12-commerce/studymaterial/economics/introductory-microeconomics/non-competitive-markets/338_1985_5828#slide4_comparison-of-the-market-forms