Note: Match the names of the Scientists given in column A with their contributions towards the understanding of the atomic structure as given below.
 
Column (A)
Column (B)
a. Ernest Rutherford
b. J.J. Thomson
c. Dalton
d.  Neils Bohr
e. James Chadwick
f. E. Goldstein
g. Mosley
Answer variants:
Discovery of electrons
Neutron
Indivisibility of atoms
Concept of nucleus
Atomic number
Canal rays
Stationary orbits