Assertion (A) : In Rutherford's experiment, `alpha` particles from a radium source were allowed to fall on a `10^(-4)mm` thick gold foil. Most of the particles passed straight through the foil.
Reason (R) : The entire positive charge and nearly whole of the mass of an atom is concentrated in the nucleus.

Options

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

Answer

B