Direction. In the follwing questions, a statement of assertion is followed by a statement of reason. While answering a question, you are required to choose the correct are out of the given four responses and mark it as
(A). If both assertion and reason are true and reason is the correct explanation of the assertion, (B) if both assertion and reason are true but reason is not correct explanation of the assertion. (C) if asssertion is true, but reason if false, (D) if both assertion and reason are false
Assertion : A proton and an alpha particle having the same kinetic energy are moving in ircular paths in a uniform magnetic field. the radii of the ciruclar paths will be equal Reasons: Any two charged particles having equal kinetic energies and entering a region of uniform magnetic field `vecb` in a direction perpendicualr to the `vecb`, will describe circular trajectories of equal radii.

Options

A. A
B. B
C. C
D. D