A proton, a deuteron and an a particle are moving with same momentum in a uniform magnetic field. The ratio of magnetic forces acting on them will be ____ and their speed is ____ in the ratio.
(1) 1 : 2 : 4 and 2 : 1 : 1
(2) 2 : 1 : 1 and 4 : 2 : 1
(3) 4 : 2 : 1 and 2 : 1 : 1
(4) 1 : 2 : 4 and 1 : 1 : 2