How many types of sandbox orgs are available in Salesforce ?

Types of Sandbox :

• Developer Sandbox : It is a copy of production and it copies all application and configuration information to the sandbox.
• Developer Pro Sandbox : It is a copy of your production organization’s reports, dashboards, price books, products, apps, and customizations under Setup, but exclude all of your organization’s standard and custom object records, documents, and attachments.
• Partial Copy Sandbox : It is used as a testing environment. It includes the reports, dashboards, price books, products, apps, and customization under Setup.
• Full Copy Sandbox : It is an exact copy of production including standard and custom objects records, attachments and documents.