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Question
Discovery of which amongst the following rays led to the discovery of proton?
Options:
A .  Magnetic rays
B .  Cathode rays
C .  Canal rays
D .  Electromagnetic rays
Answer: Option C
:
C
Eugen Goldstein in 1886 discovered the presence of positively charged rays in a gas dischargetube. He called these rays as canal rays.This experiment led to the discovery of protons.

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