Who invented electron microscope? (2010 AIIMS, 2008 JIPMER)
A. Janssen
B. Edison
C. Knoll and Ruska
D. Landsteiner
Answer:C
Who invented electron microscope? (2010 AIIMS, 2008 JIPMER)
A. Janssen B. Edison C. Knoll and Ruska D. Landsteiner