(A) in alpha particle scattering number of alpha paritcle undergoing head on collision is small.
(R) small fraction of the number of incident particles rebound back.

Options

A. Both 'A' and 'R' are true and 'R' is the correct explanation of 'A'.
B. Both 'A' and 'R' are true and 'R' is not the correct explanation of 'A'
C. 'A' is true and 'R' is false
D. 'A' is false and 'R' is true

Answer

B