In which city was Einstein's job at the Swiss Patent Office?

Correct answer: Bern

Einstein’s job at the Swiss Patent Office was in Bern, Switzerland, making option A correct. The chapter records Bern as the city where he worked as a technical expert while examining patent applications. Zurich is a plausible distractor because Einstein studied at the Zurich Polytechnic and met Mileva there, but it was not the city of this patent-office job. Ulm was his birthplace, and Munich was the city connected with his early schooling; neither was the location of the Swiss Patent Office. The governing distinction is therefore between important cities in different stages of his life: Ulm for birth, Munich for school, Zurich for higher education, and Bern for employment. Linking the office specifically with Bern is the most reliable way to solve the question.