What kind of work did Einstein do at the Swiss Patent Office?

Correct answer: Examining patents

The governing concept is understanding Einstein’s employment before his academic fame became established. At the Swiss Patent Office, he worked as a technical examiner, examining patent applications and judging whether inventions met the required technical conditions. Thus option A is correct. He did not teach music, provide military training, or write plays as his official work there. This job is important in the biography because it gave him a regular livelihood while also leaving room for him to think about scientific problems. Linking “Swiss Patent Office” with “examining patents” separates his professional duty from his private theoretical research and later university career.