(A) in the experiment of alpha particle scattering, extremely thin gold foils are preferred over other metals.
(R)gold is a ductile material.

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