Who invented the "electron microscope'' [AFMC 2001; BVP 2002; Haryana – McqOptions

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1.	Who invented the "electron microscope'' [AFMC 2001; BVP 2002; Haryana PMT 2005]
A.	Knoll and Ruska
B.	Robert Brown
C.	Correns
D.	Janssen and Janssen
Answer» B. Robert Brown

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