The correct option is D All of the above
Conclusions of Rutherford's model:
a) Size of the nucleus is of 10−15 m whereas, the size of the atom is of 10−10 m
b) Electrons revolve around the nucleus like planets around the sun.
c) 120000 is deflected back at 180∘.
Hence, a positively charged nucleus is present at the centre of the atom.
d) Majority of the alpha particles were able to pass through the thin gold foil. Hence, most of the space is empty.