This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General Microbiology Pa 1 (History, Microscopy, Stains and Structure and Physiology of Bacteria), Subject name: Microbiology
[{'content': 'Who is the founder of Electron microscope? \nSelect and explain. \nA. Antonie Philips van Leeuwenhoek, B. Ernst Ruska, C. Robe Koch, D. Louis Pasteur', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ernst August Friedrich Ruska was a German physicist who won the Nobel Prize in physics in 1986 for his work in electron optics, including the deign of the first electron microscope.', 'role': 'assistant'}]