Answer:
The ratio of the acceleration of the proton to that of the deuteron is 2
Explanation:
For a moving charge in magnetic field, the magnetic force is balanced by force due to its motion. So,

Acceleration of proton,
.........(1)
Acceleration of deuteron,
..........(2)
Since, a deuteron has the same charge as the proton but has twice its mass.
Dividing equation (1) and (2) we get :



So, the ratio of the acceleration of the proton to that of the deuteron is 2. Hence, the correct option is (a).
The zebra could be "hen pecked" if the vulture was a hen bird. On the other hand, the two might get along ok. In UK, it they 'd make a useful combination helping each other to cross increasingly dangerous roads (joke).