Statement : Specific charge of ` alpha`-particles is twice to that of proton .
Explanation : Specific charge is given by `e//m`

Options

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false
D. If assertion is false but reason is true.

Answer

D

Explanation

(d) Specific charge for proton `= ( e)/(m)` and specific charge of `alpha = (2e)/(4m) = ( e)/( 2m)`.