Which of the following are client-side JavaScript object?

Answer: Option C

Client-side JavaScript objects refer to objects that are available within the browser environment and interact directly with the user or the browser's document model.

Option A: Database - This is not a client-side JavaScript object. Databases are typically managed server-side or through external services.

Option B: Cursor - This is not a client-side JavaScript object. While cursors are used in database operations, they are not part of the JavaScript object model in the browser.

Option C: Client - This is the correct answer. Client-side JavaScript objects include the browser's window, document, navigator, and other objects that interact directly with the user's interface.

Option D: FileUpload - This is not a standard client-side JavaScript object. File uploads are handled via HTML input elements and server-side processing, though JavaScript can interact with these elements.

Conclusion:
In JavaScript, client-side objects are those that interact directly with the browser environment and user interface. Among the given options, only the Client is a client-side JavaScript object, making Option C the correct answer. Other options like Database, Cursor, and FileUpload are not considered standard client-side JavaScript objects.