1.

Which of the following is a correct statement  [IIT 1999; DPMT 2000; UPSEAT 2003]

A.            Beta rays are same as cathode rays
B.            Gamma rays are high energy neutrons
C.            Alpha particles are singly ionized helium atoms
D.            Protons and neutrons have exactly the same mass
Answer» B.            Gamma rays are high energy neutrons


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